50 pieces - Mineral Set Quality:Staff Pick Era: Archean

Era: Archean

Approximate Size for 1 piece: 49mm x 35mm x 35mm Approximate Weight for 1 piece: 95g

Quantity: 10 Pieces

and one of the main burrs any gem carver uses

It can be used with oil or water based polishes

50 pieces - Mineral Set Quality:Staff Pick Era: ArcheanMined from: USA Description: 50 piece mineral set comprised of stones found in USA. Comes with mineral guides shown in photos. The stones are glued to the back page and all together permanently affixed to the cardboard box frame. A great learning and visual set for kids and especially classrooms. Chakra: All Size of 1 Mineral set: 10cm x 35cm x 3. 7cm Approximate Weight of 1 piece: 522g Quantity: 1 (50 piece set) We do our best to buy quality products