Imagine the shock. For millions of years we thought we were one and the same … until that fateful day in 1803, when the formidable rock collector James Smithson (yes, he of Institution fame) declared we weren’t calamine at all, but two distinct minerals, one a carbonate and the other a silicate. My newly discovered “brother” eventually took the name of the good Mr. Smithson. I, because of the unusual way my crystals terminate with dissimilar faces, was called something much more Greek sounding.

Who am I?

Guess this gem for a chance to win a “Jewelry Geek” T-shirt. Be sure to include your full name and the name and address of your store. The contest winner will be selected from among correct answers to this question.

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