Pure Eilat Stone:
Eilat, or "King Solomon's Stone," looks like an artist took blue, green and gray paint then swirled it together forming beautiful patterns set in stone. Eilat is found in the Timna mining district and within one other mine along the Red Sea which has been played-out.
Though similar stones have been found in Arizona and Africa, only the Eilat from Israel contains chrysocolla specific to that region and can be called "true" or pure Eilat stone. This really shouldn't matter to most artists or their customers, but probably will to the purists among us; caveat emptor.