Joined: Tue Nov 04, 2008 11:59 pm Posts: 160 Location: Hong Kong
Hi ya,
I got a green stone which gives an OTL readings with SG of 4.66 FL inert and magnification I see minute scattered gas bubbles no other inclusions or zoning etc and i dont see doubling too! also no orange peel effect and facets are moderately sharp not molded.. Polariscope reaction dark . specs I cant see any line on the 653 to determine zircon but I see some lines in the 520-530 region 2 or 3 lines.
I am confused with glass vs. zircon
I know in general for glass R.I. and SG does not match but I know there have been cases with high refractive index green glass gia reported sometime back, not sure how prevalant it is.
Is there any other test to confirm glass or zircon? does the 653 line always appear in zircons ? and does zircon contain gas bubbles? I dont think i've seen it before.
Joined: Tue Nov 04, 2008 11:59 pm Posts: 160 Location: Hong Kong
Thanx marc for the info. its quite useful. I also requested my colleague if he can get a FTIR graph for this particular stone will upload it when I get it from him. Its an interesting case really...
Joined: Fri May 12, 2006 11:24 am Posts: 7523 Location: Rome, Italy
i'd like to see a Raman spectrum instead of FTIR one............your friend's software seems the OMNIC provided by Thermo, likely the FTIR unit is a nicolet 6700 or similar................maybe your friend has access to a Raman setup................
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum