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 Post subject: By the numbers
PostPosted: Wed Jan 03, 2007 7:10 pm 
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Double my RI. Take that number and add the digits together. Divide that number by 2. That is my hardness. What am I?


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PostPosted: Wed Jan 03, 2007 7:23 pm 
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***Guess removed so that others can play***


Last edited by gem-n00b on Wed Jan 03, 2007 7:46 pm, edited 1 time in total.

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PostPosted: Wed Jan 03, 2007 7:31 pm 
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Spinel it is. Opal was a little too rangy.
Good job n00b. That didn't take long at all.
Do you have an abacus? :lol:


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PostPosted: Wed Jan 03, 2007 7:37 pm 
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Not to sound like a TOTAL shill, but I used GTPro. I used the gemstone separator and limited the search to SR gems (since it seemed like a good idea) and then I just used my calculator on all the gems that seemed reasonable from the list. :)


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PostPosted: Sun Jan 14, 2007 11:24 am 
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Diopside also works if you use it's lowest RI of 1.67.


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