Posted 9 years ago
TinyT
(24 items)
Any ideas what these could be, they are green translucent and glow bright purples blue under UV light and green under a Chelsea filter.
Green raw stones | ||
| Rocks and Minerals269 of 291 |  |  |
Green raw stones | ||
| Rocks and Minerals269 of 291 | | |
Posted 9 years ago
TinyT
(24 items)
Any ideas what these could be, they are green translucent and glow bright purples blue under UV light and green under a Chelsea filter.
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Green Florite.
T A
Thanks, I will look into that now. It's not something I have heard of before.
Do you think it would be worth getting it faceted?
That's up to you, the stones with natural fractures are going to break, so the finished goods from them will be small. It's also a soft stone wear wise.
http://geology.com/minerals/fluorite.shtml
T A
Thanks I will look into it.
With the green under Chelsea filter, may be rather raw Paraïba tourmaline
https://books.google.fr/books?id=qDuSyVsv4VEC&pg=PA82&lpg=PA82&dq=fluorite+chelsea+filter&source=bl&ots=xqyi5Qcqyu&sig=nHQB913qSFK87JTQTGQ1wAYe2Lc&hl=fr&sa=X&ved=0CCMQ6AEwAmoVChMI0IqErL74xgIVSD0UCh3EcgNY#v=onepage&q=fluorite%20chelsea%20filter&f=false
http://www.gia.edu/cs/Satellite?blobcol=gfile&blobheader=application%2Fpdf&blobheadername1=Content-Disposition&blobheadername2=MDT-Type&blobheadername3=Content-Type&blobheadervalue1=attachment%3B+filename%3DSP06A1.pdf&blobheadervalue2=abinary%3B+charset%3DUTF-8&blobheadervalue3=application%2Fpdf&blobkey=id&blobtable=GIA_DocumentFile&blobwhere=1355958132315&ssbinary=true
Do a hardness test on a hidden side you don't mind scratching. A steel knife blade is usually a 5.5, and a pre 1982 cent is a 3, fluorite is a 4. If the cent doesn't scratch it but the knife does, we know it's not Quartz, Tourmaline, Sapphire, etc.
T A
Oh! Good trick/test, T.A!
I'll keep it in note :-)
I have a knife only, as I'm not from the states I don't have the coin.
The knife does scratch, the stone appears to be quite soft.
Quite sure Tubeamp is correct. But thanks for the advice.
So it's below 5.5 on Mohs Scale of Hardness. So fluorite is still in the running.
T A
I also had a look at a few other specimens of raw green fluorite on the web and it looks alike in colour and structure. So my bets are on green fluorite.
Maybe you can check on my other mysteries too !