This is a heavy gauge tested sterling silver and 14 karat gold hand-crafted brooch, unmarked, 2 & 5/8 by 1 & 5/8 inches, made of natural tourmaline crystals depicting skyscrapers in a modern urban landscape. At the base, the thickness is a substantial 1/4". The silver has not been polished and is a little patinated. It does not have that dark bluish cast though. (That's scanner magic/irritant.) But you get the idea from the several pictures. Quite unusual, possibly even unique!