Roberts Victor- McCandless Teaching Collection Macrodiamonds develop - - PDF document

Roberts Victor- McCandless Teaching Collection

Macrodiamonds develop a distinct set of shapes and surface features that relate to their growth in the mantle, and to their resorption in the transporting kimberlite. This collection is designed to let the observer become familiar with these characteristics. Vial # Shape Description 1 single octahedra sharp-edged octahedral crystals. Very easily distinguished under the microscope (N=9). 2 resorbed octahedra note rounding of crystal edges. The assemblage of diamonds in this vial exhibit resorption at different stages of advancement (N=9). 3 tetrahexahedroida ‘thh’

• ctahedral faces replaced by thh sufaces. This

form is incorrectly referred to as ‘rounded dodecahedron’ in older literature (N=10) 4

• ctahedral twins
• ctahedral crystals grown together in symmetrical

fashion (N=7) 5 resorbed twins crystals like those shown above but now resorbed to have thh surfaces present (N=5) 6 aggregates

• ctahedral crystals grown together in random

fashion (N=7) 7 resorbed aggregates resorbed equivalent of the aggregates (N=9) 8 distorted octahedra diamonds with one or more of their crystal axes and tetrahexahedroida longer than the others (N=12) 9 broken crystals single broken stones, including resorbed forms. Most of the crystal is still present (N=9) 10 fragments broken stones that have less than half the original crystal present (N=15) 11 uneven resorption stones that exhibit resorption of varied intensity

• ver their surfaces – xenolith diamonds (N=6)

The collection should be examined in order, from 1 to 11. The goal of the exercise is to become familiar with the shapes and in particular the surface features that distinguish diamonds from most other minerals. Note that the groupings are not perfect, and diamonds in one group may exhibit features that are also present on diamonds in another group.

0.0 0.1 1.0 10.0 100.0 1000.0 10000.0 +0.100-0.150 +0.150-0.212 +0.212-0.300 +0.300-0.425 +0.425-0.600 +0.600-0.850 +0.850-1.180 +1.180-1.700 +1.700-2.360 +2.360-3.350 +3.350-4.750 +4.750-6.700 Sieve Class, mm

Diamonds per tonne

Kimberlite A- MDT 0.1517 t Kimberlite A- DMS ~0.1cpt; 11 t Kimberlite E-MDT, 0.195t, ~1cpt

Toronto Stock Exchange April 2, 2012 Trading Symbol: PGD For Immediate Release

PEREGRINE REPORTS TONNAGE ESTIMATE AND NEW MICRODIAMOND RESULTS FOR CH-6 KIMBERLITE AT CHIDLIAK

Peregrine Diamonds Ltd. ("Peregrine” or “the Company”) (TSX:PGD) is pleased to report an independently verified tonnage estimate for the CH-6 kimberlite of up to 5.7 million tonnes of kimberlite to a depth of 375 metres below surface. The kimberlite pipe remains open at depth. A detailed technical report, prepared in accordance with National Instrument (“NI”) 43-101, will incorporate this new tonnage estimate. CH-6 is located within the Southern Focus Area on the 100 percent-owned, 8,580 square kilometre Chidliak project (“Chidliak”

• r “the Project”), Baffin Island, Nunavut, Canada.

New microdiamond results from the CH-6 kimberlite continue to confirm a coarse diamond size distribution. A cumulative 1,512.3 kilogram sample of drill core collected from CH-6 in 2011 yielded 4,867 diamonds larger than the 0.106 mm sieve size, including 166 commercial-size diamonds larger than the 0.850 mm sieve size which weigh a total of 6.77 carats. The Saskatchewan Research Council Geoanalytical Laboratories (“the SRC”) classified the colours of the 166 commercial-size diamonds as follows: 42 percent white/colourless, 40 percent off-white, 14 percent yellow, 3 percent grey and 1 percent brown. The largest four diamonds were described by the SRC as a 0.60 carat off-white aggregate, a 0.43 carat yellow octahedron, a 0.34 carat off- white octahedron and a 0.32 carat white/colourless octahedron.

• Mr. Brooke Clements, Peregrine’s President, said “Completion of an independently verified tonnage estimate

for CH-6 of 5.7 million tonnes of kimberlite is an important step in advancing the Chidliak project. We are especially encouraged by the microdiamond results from CH-6 which continue to be some of the best ever seen in Canadian diamond exploration. The diamonds recovered to date from CH-6 show a predominance of white/colourless, off-white and yellow colours and a coarse diamond size distribution. Continued evaluation of CH-6, beginning with more core drilling in 2012 and the collection of a bulk sample by reverse circulation drilling in 2013, will confirm the grade of the pipe and is designed to recover a minimum 200 carat parcel of diamonds in order to begin formal diamond valuations.” CH-6 Tonnage Estimate Geostrat Consulting Services Inc., a consulting firm specializing in kimberlite geological modeling and resource evaluation, verified the CH-6 tonnage estimate. Based on the current geological model, it is estimated that CH-6 hosts 5.7 million tonnes of kimberlite to a depth of 375 metres below surface. Of the 5.7 million tonnes, 3.6 million tonnes is considered reasonably defined with good drilling support. The remaining 2.1 million tonnes has been identified with limited drilling support and the confidence level of this tonnage will be increased with more drilling. Real potential exists to add significant tonnage at depths below 375 meters. This tonnage estimate does not constitute a mineral resource and there is no assurance that a resource will be identified through further exploration work of CH-6. The current geological model of CH-6 was defined from core drilling completed between 2009 and 2011. To date, 12 vertical and 12 inclined drill holes have been completed for a total of 4,701 metres. The geological model was prepared to the base of current drilling at a depth of 325 metres, with an additional projection to 50 metres below the base of drilling, at 375 metres depth. The tonnage estimate was determined using kimberlite volumes from the geologic model and specific gravity data for each geologic unit. The average specific gravity for 323 separate measurements was 2.58 g/cm3. A detailed technical report prepared in accordance with NI 43-101 incorporating this new tonnage estimate will be filed on SEDAR within 45 days.

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New Microdiamond Results The following table summarizes caustic fusion diamond results from the CH-6 kimberlite. The analyses were performed at the SRC.

SUMMARY OF CAUSTIC FUSION DIAMOND RESULTS FOR 2011 SAMPLES FROM THE CH-6 KIMBERLITE

Unit Sample Weight (kg) Numbers of Diamonds According to Sieve Size Fraction (mm) Total Diamonds Carats (+0.850 mm size) +0.106

• 0.150

+0.150

• 0.212

+0.212

• 0.300

+0.300

• 0.425

+0.425

• 0.600

+0.600

• 0.850

+0.850

• 1.180

+1.180

• 1.700

+1.700

• 2.360

+2.360

• 3.350

+3.350

• 4.750

KIM-A 298.4 420 262 159 96 55 45 18 12 2 1 1,070 1.17 KIM-B 929.5 924 640 362 224 131 94 44 21 9 3 1 2,453 3.40 KIM-D 179.3 194 127 100 62 40 26 10 8 2 1 1 571 1.22 OTHER* 105.1 312 175 111 73 41 28 18 10 5 773 0.98 TOTAL 1,512.3 1,850 1,204 732 455 267 193 90 51 18 5 2 4,867 6.77

* Additional work is required to classify this kimberlite material. KIM-C was not sampled during the 2011 drilling. The CH-6 kimberlite is a steep-sided, near-vertical, southwest plunging kimberlite pipe with a kidney-shaped surface expression of approximately one hectare. The current geological interpretation of CH-6, based on detailed core logging and three dimensional modeling, suggests that there are four main kimberlite units. Differences between the units are subtle with few clear geologic contacts and all units contain a variety of mantle xenoliths. The four main units are as follows:

• KIM-A: a dominantly pyroclastic textured kimberlite found in the upper 120 metres of the pipe. It has

carbonate xenoliths with fewer gneissic xenoliths.

• KIM-B: a dominantly coherent textured kimberlite that is the most volumetrically significant unit at CH-6.

It has gneissic xenoliths with fewer carbonate xenoliths.

• KIM-C: a coherent kimberlite that is found in the lower two-thirds of the pipe, marginal to KIM-B. This

unit lacks carbonate xenoliths.

• KIM-D: a complex textured kimberlite that is found in the lower two-thirds of the pipe, marginal to KIM-C

with many features similar to KIM-A, including the presence of carbonate xenoliths. In addition to these four main units, the upper 40 metres of the pipe is capped by a weathered kimberlite

• horizon. There are volumetrically insignificant, minor kimberlite units that need further analysis in order to be

grouped with the four main units. Diamond results reported today are from three of four main units, KIM-A (holes 15 and 16), KIM-B (holes 16, 17, 21, and 23) and KIM-D (hole 23) as well as some minor units (holes 15 and 16). The KIM-C unit was not sampled during the 2011 drilling. As announced on December 6, 2010, a 14.11 tonne mini-bulk sample from CH-6 returned 40.04 carats of commercial-sized diamonds larger than the 0.85 mm sieve size for an average grade of 2.84 carats per tonne (“cpt”). The sub-samples, which were processed separately and ranged in size from 1.03 to 7.56 tonnes, returned diamond grades of 6.81, 3.49, 2.82 and 2.03 cpt. The sub-sample with the highest grade was collected from the upper portion of the southern half of the pipe, an area not tested in the 2011 drilling. Details

• f the 2011 core drilling were reported on September 12, 2011.

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Images and additional information about the CH-6 pipe, including complete diamond results to date, are available on Peregrine’s web-site at www.pdiam.com/i/pdf/Chidliak917.pdf Future Work on CH-6 The collection of a bulk sample from CH-6 by reverse circulation drilling, designed to collect at least 200 carats

• f diamonds for diamond valuation, is scheduled for early 2013. Peregrine plans to drill up to 8 core holes into

CH-6 this year to acquire more diamonds and to establish pilot holes for the 2013 bulk sample, to acquire preliminary geotechnical information and to better define the pipe’s overall size and internal geology.

• Mr. Alan O’Connor, Professional Geologist, Peregrine’s Chidliak Project Manager, is a Qualified Person under

NI 43-101 and is responsible for the design and conduct of the programs carried out by the Company at Chidliak.

• Mr. David Farrow, B.Sc. (Hons), Pr.Sci.Nat., P. Geo., of Geostrat Consulting Services Inc., an independent

Qualified Person and a consultant to Peregrine, reviewed and verified the geological model and tonnage

• estimate. Mr. Farrow is a Geologist and Geostatistician who has over 30 years worldwide experience in the

minerals industry, with most of that experience in diamond deposit evaluation and resource estimation. From 1986 to 2006 Mr. Farrow worked for De Beers and related companies with his last position at De Beers Group Services being Group Evaluation Manager.

• Mr. O’Connor and Mr. Farrow have reviewed this release and approve of its content.

For further information, please contact Mr. Eric Friedland, CEO, Mr. Brooke Clements, President, Mr. Mike Westerlund, Vice President, Investor Relations or Peregrine Diamonds Investor Relations, at 604-408-8880 or at investorrelations@pdiam.com.

Forward-Looking Statements: This news release contains forward-looking statements. All statements, other than statements of historical fact, that address activities, events or developments that the Company believes, expects or anticipates will or may occur in the future (including, without limitation, statements relating to the proposed exploration program, funding availability, anticipated exploration results, resource estimates, and future exploration and operating plans) are forward-looking statements. These forward-looking statements reflect the current expectations or beliefs of the Company based on information currently available to the Company. Forward-looking statements are subject to a number of risks and uncertainties that may cause the actual results of the Company to differ materially from those discussed in the forward-looking statements and, even if such actual results are realized or substantially realized, there can be no assurance that they will have the expected consequences to, or effects on, the Company. Factors that could cause actual results or events to differ materially from current expectations include, among other things, uncertainties relating to the availability and cost of funds, timing and content of work programs, results of exploration activities, interpretation of drilling results and other geological data, world diamond markets, future diamond prices, reliability of mineral property titles, changes to regulations affecting the Company's activities, delays in obtaining or failure to obtain required project approvals, operational and infrastructure risks, and other risks involved in the diamond exploration business. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable securities laws, the Company disclaims any intent or obligation to update any forward-looking statement, whether as a result of new information, future events or results or otherwise. Although the Company believes that the assumptions inherent in the forward-looking statements are reasonable, forward-looking statements are not guarantees of future performance and accordingly undue reliance should not be put on such statements due to their inherent uncertainty.

Suite 860 – 625 Howe Street, Vancouver, BC, Canada V6C 2T6 Tel: 604 668 8355 / Fax: 604 689 5041 News Release

NORTH ARROW ANNOUNCES CANADA’S NEWEST DIAMOND DISCOVERY AT THE PIKOO DIAMOND PROJECT, SASKATCHEWAN

November 5, 2013 Trading Symbol: TSXV: NAR #13-20 North Arrow Minerals Inc. (TSXV-NAR) (“North Arrow”) is pleased to announce that high microdiamond counts, demonstrating the potential for a coarse diamond size distribution, have been returned from the PK150 kimberlite at Pikoo, a new kimberlite district located in central eastern Saskatchewan that was discovered by North Arrow earlier this year. Highlights of this announcement include:

• A 209.7 kg sample of drill core from the PK150 kimberlite has returned 745 diamonds larger than the

0.106 mm sieve size, including 23 diamonds larger than the 0.85 mm sieve size;

• Total weight of the +0.85 mm diamonds recovered from the sample is 0.2815 carats;
• Over 95% of the diamonds are described as intact, white octahedrons and aggregates.

The PK150 caustic fusion results are summarized in the following table. Number of Diamonds per Sieve Size (mm Square Mesh Sieve) Sample Weight Dry Kg +0.106

• 0.150

+0.150

• 0.212

+0.212

• 0.300

+0.300

• 0.425

+0.425

• 0.600

+0.600

• 0.850

+0.850

• 1.18

+1.18

• 1.70

+1.70

• 2.36

Total Stones Total Carats +0.85mm 209.7 392 199 65 27 19 20 21 1 1 745 0.2815 Ken Armstrong, President and CEO of North Arrow stated, “To recover such relatively high counts of +0.85 mm diamonds from the first kimberlite discovered at Pikoo is an exceptional result and establishes Pikoo and the northern Sask Craton as a new diamond district in Canada. PK150 was discovered as part of a short, 10 hole program completed earlier this year, and many priority targets remain on the 33,000+ ha property. One of the key benefits for the project is its location close to transportation and power infrastructure, lying within ten kilometres of Saskatchewan Highway 911.” The PK150 kimberlite was discovered during a 2,002 m drilling program completed in July 2013 (please see North Arrow news release #13-13 dated August 7, 2013 for details). This drilling program and related diamond testwork is being funded by North Arrow as part of an option agreement with Stornoway Diamond Corporation (TSX-SWY) under which North Arrow can earn an 80% interest in the Pikoo Project. PK150 was tested by three drill holes and is interpreted as a 10 to 15 m wide, near vertical body, intersected over a 75 m strike length and it is currently open to depth and along strike. The kimberlite is comprised of dark grey hypabyssal kimberlite containing abundant olivine as well as common ilmenite and orange to purple garnets and less common chrome diopside. Internal country rock dilution is estimated as less than 8% and mantle nodules ranging up to 10 cm are common. Recovered diamonds have similar, high quality characteristics across all size fractions, with over 95% described as intact white octahedrons and aggregates with lesser macles. A photograph of a selection of the diamonds can be viewed here: http://www.marketwire.com/library/20131104-909125.jpg.

A study of the mineral chemistry of the kimberlites discovered in 2013, including PK150, is currently underway. This work will allow for a comparison to the compelling chemistry of the kimberlite indicator mineral trains identified within the 33,374 ha Pikoo property. This large project area hosts additional kimberlite targets and numerous anomalous KIM samples that require further follow up and target definition. Exploration plans for 2014 will be developed over the next couple of months; work is expected to include drilling, geophysical surveys and till sampling.

• Mr. Armstrong continued, “Today’s news validates North Arrow’s strategic approach of targeting and assembling a

prospective portfolio of Canadian diamond projects that benefit from significant historical exploration, and are now at an advanced or drill ready stage. North Arrow is well positioned with more than $6 million cash on hand to further advance this new diamond discovery at Pikoo, to collect a 500+ carat diamond parcel from the advanced Qilalugaq Project in Nunavut, and to evaluate unexplained kimberlite indicator mineral trains at the Redemption and Lac de Gras Diamond Projects in the heart of the Lac de Gras diamond district of the NWT.” North Arrow retains the right to earn an 80% interest in the Pikoo Project by completing an option work program consisting of 2,000 m of diamond drilling. The July 2013 drilling program and related diamond results announced today have fulfilled the requirements of the option work program and North Arrow shall provide notice to Stornoway

• f its intent to vest an 80% interest in the project, subject to a one time back-in right held by Stornoway. Upon

receipt of the vesting notice from North Arrow, Stornoway will have a 60 day period in which to elect to increase its interest in the Pikoo Project from 20% to 40% by paying to North Arrow an amount equal to three times the costs incurred by North Arrow in connection with the option work program. Conference Call and Webcast The Company will hold a conference call and webcast on November 5, 2013 at 11:00 am ET where management will provide further information and context for today’s announcement. Management will respond to questions from analysts and investors via the conference call. To join the Conference Call – dial 416-695-7806 / 888-789-9572 and enter the participant passcode: 3537808 To join the Webcast - http://www.gowebcasting.com/5098 The conference call will be recorded and playback will be available after the event's completion by dialing toll free in Canada and the United States 1-800-408-3053 or locally, 905-694-9451 and entering the passcode: 7750286. The webcast of the presentation with voice recording will be available for one year following the call. Scientific and Technical Data Diamond results reported above are based on work completed by Microlithics Laboratories, Thunder Bay, Ontario, an independent mineral process laboratory facility. Quality assurance protocols, security and actual operating procedures for the processing, transport and recovery of diamonds conform to industry standard Chain of Custody

• provisions. As part of North Arrow's ongoing QA/QC programs, concentrate residues and other materials are subject

to audit. Any significant changes to recovered diamond contents will be reported when available. The 2013 Pikoo drilling program was conducted under the direction and supervision of Barbara Kupsch, P. Geol., project manager for the Pikoo Project. North Arrow’s diamond exploration programs are conducted under the direction of Kenneth Armstrong, P.Geo., President and CEO of North Arrow and a Qualified Person under NI 43-101. Mr. Armstrong has reviewed the contents of this press release. About North Arrow Minerals

North Arrow is a Canadian based exploration company focused on the identification and evaluation of diamond exploration opportunities in Canada. North Arrow’s management, board of directors and advisors have significant successful experience in the Canadian diamond industry. In addition to the Pikoo Project, North Arrow is also conducting exploration at each of the Qilalugaq (Nunavut), Redemption (Northwest Territories), Lac de Gras, (Northwest Territories), Mel (Nunavut), Luxx (Nunavut) and Timiskaming (Ontario) Diamond Projects. North Arrow Minerals Inc. /s/ “Kenneth A. Armstrong” Kenneth Armstrong President and CEO

For further information, please contact: Ken Armstrong Tel: 604-668-8355 Website: www.northarrowminerals.com Neither the TSX Venture Exchange nor its Regulation Services Provider accepts responsibility for the adequacy or accuracy of this release.

This news release contains "forward-looking statements" including but not limited to statements with respect to North Arrow’s plans, the estimation of a mineral resource and the success of exploration activities. Forward-looking statements, while based on management's best estimates and assumptions, are subject to risks and uncertainties that may cause actual results to be materially different from those expressed or implied by such forward-looking statements, including but not limited to: risks related to the successful integration of acquisitions; risks related to general economic and market conditions; closing of financing; the timing and content of upcoming work programs; actual results of proposed exploration activities; possible variations in mineral resources or grade; failure of plant, equipment or processes to operate as anticipated; accidents, labour disputes, title disputes, claims and limitations on insurance coverage and other risks of the mining industry; changes in national and local government regulation of mining operations, tax rules and regulations. Although North Arrow has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance

• n forward-looking statements. North Arrow undertakes no obligation or responsibility to update forward-looking statements, except as required

by law.