Joined: Sun Jul 09, 2006 11:19 am Posts: 273 Location: Michigan & Arizona
Hi all,
Was taking some photos for the site and starting playing around with a few things. Came up with this shot and thought it may make a decent little quiz.
The stones here are all of the same species. It is a doubly refractive species, harder than apatite and softer than sapphire. It is not tourmaline and the stones in the photo are from very different localities.
Any guesses so far? Extra credit for naming the varieties!
Joined: Sun Jul 09, 2006 11:19 am Posts: 273 Location: Michigan & Arizona
Perhaps more challenging than I suspected!
Ok, let's see. Softer than any of the guesses so far - though we are not talking about some obscure rarity that is a 3 or something like that, I promise. Higher RI than Beryl.
Joined: Tue Aug 01, 2006 3:24 am Posts: 4997 Location: McDonough GA
The blue one is throwing me off. I can come up with species that come in blue and pink or blue and green or pink and green but not blue pink and green. Hmmmmmmmmmm. Have any of these stones been treated?
I guess they are all feldspars, of one variety or another (Though if recent debate is anything to go by then at least some of these may be treated...so maybe not)
Joined: Wed Nov 23, 2005 12:47 pm Posts: 2505 Location: Eastern Europe
So far, the you gave mentions:
- doubly refractive
- hardness between apatite and zircon
- RI above beryl (how hard is that!)
- those colors
clearly, the academic ID method would be to work through that list of probabilistic possibilities, but that sounds more like writing a boring book then answering a little Sunday quiz. And ya' never know...
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