alexandrite

[dryhorrors]

Being a very rare gem wondering if anyone has found one?

 

[dryhorrors]

here is a link so you can see what im talking about, the main reason why im asking is im looking for a stone to cross reference with the stone i currently have
in normal daylight its blue green, and under fluro lights it turns pink/purple,
http://www.jtv.com/library/alexandrite-gemopedia.html
again thanks for looking guys

 

[Heatho]

Here's some good info on it. I don't know much about it.

http://www.ajsgem.com/gemstone-information/alexandrite-17.html

http://www.alexandrite.net/chapters/chapter6/index.html

 

[dryhorrors]

best pics i could get its hard to get the daylight color's in pics any suggestions

with natural light its blueish, green and grey

 

[WalnLiz]

My advice is per the PM you sent me, but hopefully some of the Lapidary guys may have some suggestions for you.

A Refractive Index test is what I would certainly do first to at least get it into a specific gemstone group. Some pics with direct natural sunlight would give us a better indication of colour and possible colour change on Axis rotation.

Cheers Wal.

 

[Heatho]

Due to Chromium content Alexandrite apparently will fluoresce under UV also, that is one test to identify it from other Chrysoberyl. It's not a definitive test at all but a quick simple test if you already suspect it is Alexandrite.

I know, I know UV is a poor test...... but I like stuff that fluoresces though.

As Wal said RI is the best way to start to go about a propper ID.

 

[dryhorrors]

hey guys still no clue lol
havent had the time to take it to a gem dealer, under UV/black light it turns green,
i got no idea lol, could just be a fancy bit of glass.... lol

 

[Piep]

Mindat.org is your friend: http://www.mindat.org/min-109.html

A variety of Chrysoberyl

Green chromian variety of chrysoberyl (intermediate member of Chrysoberyl-Mariinskite series) that exibits a color change in natural and artificial light from green to amethystine (Alexandrite effect).