Peregrine Reports Diamond Results For 49.6 Tonne Sample From CH-1A Phase Of CH-1 Kimberlite

January 28, 2010 PDF version
Peregrine Diamonds Ltd. (“Peregrine” or “the Company”) is pleased to report that a 49.6 tonne sample of surface material collected from the CH-1A phase of the CH-1 kimberlite, returned 20.26 carats of commercial-sized diamonds larger than 0.85 mm for a diamond content of 0.41 carats per tonne (“cpt”). The CH-1 kimberlite is located on the 9,800 square kilometre Chidliak project (“Chidliak”), Baffin Island, Nunavut, Canada. The sample was processed by dense media separation (“DMS”) at the Saskatchewan Research Council Geoanalytical Laboratories (“the SRC”). The diamond results are presented in the following table.

SUMMARY OF CH-1A MINI-BULK SAMPLE DIAMOND RESULTS

Dry
Sample
Weight
(tonnes)

Numbers of Diamonds According to Sieve
Size Fraction (mm)

Total
Diamonds

Total Carats
>0.85 mm

Diamond
Content

(cpt)
(+0.85 mm)

0.85

1.18

1.70

2.36

3.35

4.75

-1.18

-1.70

-2.36

-3.35

-4.75

49.6

34

86

60

24

10

0

214

20.26

0.41

The diamond content of the CH-1A sample as determined by DMS processing may not be representative of the overall diamond content of the CH-1 kimberlite due to a number of factors including the limited area of the kimberlite from which the CH-1A sample was collected, the relatively small size of the sample and the known presence of multiple kimberlite phases at CH-1.

The 49.6 tonne sample returned a total of 15 diamonds larger than 0.30 carats in size, the largest diamond was a 1.35 carat brown octahedron and the second largest stone was a 0.71 carat white/colourless aggregate of octahedrons. Howard Coopersmith, an independent consultant to Peregrine, examined the entire diamond parcel and described the colours of 126 diamonds and the crystal forms for 64 diamonds. The following colour classification was provided for all 94 diamonds larger than the 1.70 mm sieve size and 32 of the 86 diamonds larger than the 1.18 mm sieve size: 55% white/colourless, 17% off-white, 25% brown and 3% grey. The following classification of crystal forms was provided for 34 diamonds larger than the 2.36 mm sieve size, and 30 of the 60 diamonds larger than the 1.70 mm sieve size: 50% octahedrons, 23% transitional octahedrons (resorbed tetrahexahedrons), 13% irregular, 11% clivage (fragments) and 3% macles. While the smaller stones were not described in detail, these observations appear to be representative of the entire parcel. Photographs of the 1.35 carat brown octahedron, a gem quality 0.47 carat white/colourless octahedron and three other gem quality white/colourless octahedrons ranging in size from 0.19 to 0.37 carats are available here.

The 49.6 tonne sample was collected from a small, easily accessible outcrop of the CH-1A phase near the north end of the CH-1 kimberlite as a follow-up to the favourable diamo