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Gold/Mining/Energy : ASHTON MINING OF CANADA (ACA)
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To: Blue who wrote (2017)9/11/1997 9:05:00 PM
From: Jim P   of 7966
 
Hi John

I know a little about diamonds, hopefully this will help.

Colour and clarity is all we are concerned with here,

Colour is graded on a scale A to Z. A being the whitest and Z being the yellowist. Most stones you see in rings are G-H color. At G-H the stone still looks white. At J it starts to look somewhat yellowish. As you get higher up in the alphabet the stone actually begins to look yellow. I have never come across a stone used as jewellery above K-L.

Clarity is graded as follows, VVS(very very slight inclusion)not visible to the naked eye, VS(very slight inclusion) not visible to thenaked eye of the average person but visible to naked eye of an expert, SI(slight inclusion) visible to the naked eye, I(inclusion)visible with easy by the naked eye. The grades of VVs, VS, SI, and I can be followed by a number which represents the number of inclusions. An inclusion is usually a partical of carbon but can be just about anything else which creates an imperfection.

A crack of fracture is usually just that and in my experience not referred to as an inclusion.

In my opinion colour and size is the most important aspect of a raw diamond in determining its commercial potential. Inclusions will appear in most diamonds, the trick is to cut the raw diamonds in such a way as to eliminate as many of the inclusions as possible in the finished product.

Diamonds of extremely poor color can be used in diamond drill tips and saws. So they still have some commercial applications.

the release states "generally clear.......and.......others slightly of colour. No help in applying the above scale of measure. The larger stones the found are still very tinny. Commercial value of each assuming they are gem quality is about $36 and $24 respectively.

Hope this helps a bit.
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