I am probably the oldest known green pigment.
And congratulations to our winner.
I am California's official gemstone (no Googling allowed!).
It's said the prophet Mohammed wore a silver ring set with it.
At least Peter the Great and the English monarchs thought I was worthy of showing off.
Yet, there's hardly a gemologist who doesn't own at least one specimen.
My name is based on my original homeland.
Right down to my occasionally radioactive core.
Consider this a test of your knowledge of the Mohs scale.
This green stone offers emerald-like beauty at a fraction of the price.
Test your knowledge.