These gorgeous little crystals are Herkimer Diamonds, which is a type of Quartz. They have some black inclusions and a natural shape. They have been drilled then attached to the chain.
The pendant is about 0.75 inch long, and the chain is about 18 inches long.
if you would like a different chain length please leave a note at checkout or email me immediately after purchase at firstname.lastname@example.org. Please consider measurements carefully.