The specimen is a collection of lustrous sphalerite tetrahedrons with strong fluorescent calcite and some chalcopyrie from the Borieva mine in Bulgaria.These crystals and mineral specimens are highly sought after by collectors due to their unique beauty and rarity. The strong fluorescent calcite adds a special touch to the already stunning sphalerite tetrahedrons, making them a desirable addition to any collection.The piece is 4 x 2 and a quarter x 1 and 3 quarter inches and ways 1 LB.I only ship to the lower 48 states.