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Bob''s Flashes - Dark Inclusions

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dimonbob

Brilliant_Rock
Trade
Joined
Dec 12, 2000
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670
Bob’s Flashes – Dark Inclusions

Most of us have seen dark “carbon spot” inclusions in diamonds. In reality these dark inclusions can be any number of things including carbon.
We who are looking for a beautiful “eye clean” diamond look with distain at these blotches but there are many who collect, photograph and document these expensive inclusions.
They can be any number of different mineral inclusions. If you put one of these diamonds in the gem microscope and pump enough light onto the subject, you will often fine that the inclusion is red or green or some other color. The red inclusions are often pyrope garnets or rutile where the green may be olivine or chromian diopside. I once had a beautiful change of color inclusion that I just knew was an alexandrite. It sent it to John Koivula at GIA. He sent me an e-mail after he had studied it and let me know that it was only a knorringite-pyrope garnet and had seen a number of them. I was disappointed and then jumped in the middle of my books to find out what a knorringite-pyrope garnet was.
I don’t know everything but I am willing to learn.
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
This is fascinating subject indeed, Bob.

website.

Purple garnet:
garnet.gif


Orange garnet:
eclogite.gif


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pqcollectibles

Ideal_Rock
Joined
Feb 22, 2003
Messages
3,441
WOW Leonid! Some neat pics.

I think a diamond with an identifiable color would be a neat "birthmark" to identify "MY" stone by.

I have a problem with the smaller "black" looking ones though.

Great Post, Bob! Enjoying your lessons much!
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pqcollectibles

Ideal_Rock
Joined
Feb 22, 2003
Messages
3,441
Sorry for the double post. Don't know if it's my server, or what, but I've been having problems with Price Scope today.
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anniediamond

Rough_Rock
Joined
May 5, 2003
Messages
18
Hi Dimonbob! I am getting such a great education about diamonds reading your daily posts. Thanks for the information. There is SO much more to this than I ever imagined.
--Annie
 
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