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Tasmanian Prospecting • View topic - how to id gems?
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Gemstones and Mineral Specimens

how to id gems?

Tasmanian Gemstone and mineral specimen Prospecting

Moderator: Philski

by hessian » Fri Dec 18, 2015 5:55 pm

hi all, im new to prospecting and have recently moved to NE Tas around Derby area, I was just wondering if anyone could give me any tips on how to identify gems or recommend any good books on id,ing gems? I have a goldn sands hand pump and have pumped up a few buckets of sand but am not really sure of what to look out for
hessian
 
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by Philski » Sat Dec 19, 2015 7:17 pm

Hi for books i still use the Field Guide to Australian Rocks Minerals and Gemstone (1976) Wolf Mayer (Author) it is quite hard to find a copy nowadays though.
The dichotomous key in it is simple to use. And covers just about every mineral you will find locally.

Every mineral regardless of where it from has a unique crystal structure to work on and colour and hardness and streak and a few other unique identifiers. Lustre, cleavage, refractive index, specific gravity etc.

Online the Gemological Institute of America
Minerals.net
Mineralogical society of America
And geology.com have a downlaodable chart to help identify minerals.
Rockhounds online dichotomous key

There are also several geologist, gemologist and mineralogist on this site that would be glad to help.


hope that helps.
Phillip
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Philski
 
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Location: Sheffield Tasmania


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