Joined: Mon Sep 11, 2006 7:11 am Posts: 102 Location: Cape Town
This contentious sapphire is violet when viewed under daylight equivalent light. It is free of inclusions but for the fine curved hair like inclusion. I have read that one can get curved platinum inclusions like this one in some Chatham Synthetics (GIA Fall 1982 Pg 153). It has a typical ruby spectrum with a strong chromium presence. The issue is the client is getting different opinions, some say natural and some say synthetic. LWUV - bright violet red. SWUV - dull violet red. I have no doubt it isn't a Vernueil synthetic but possibly Chatham if synthetic. I would appreciate any comments based on the above.
Attachments:
File comment: Very strong chromium presence IMG_1812.jpg [ 41.33 KiB | Viewed 1095 times ]
File comment: Strong red colour when a daylight equivalent fibre optic light (150W) is passed through it. DSC_0043.jpg [ 4.68 MiB | Viewed 1095 times ]
File comment: This is a pic of the fine needle inclusion that bends like the one in the GIA article. DSC_0031.jpeg [ 4.5 MiB | Viewed 1095 times ]
That last image sure looks like a classic platinum inclusion found in Chatham synthetics. If the needle from your first set of images is indeed curved(I cannot tell from the image), I lean towards synthetic. The Chrome line in the spectra is consistent but hardly definitive.
Gemology should not be practiced through on line images so take this with a grain of salt.
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