This is a large plate of large, lustrous cassiterites. Right in the middle is a crystal which is trying to be a sixling twin (see the detail photo below). The largest crystal has a ding which you can also see in the detail photo, but overall the piece is in great shape. The cassiterites are all very lustrous, and some quite translucent / transparent. They are nicely scattered across a contrasting matrix. This is a classic Bolivian cassiterite. 12 x 8 x 4 cm.