Excavate your very own natural crystals. Add them to your rock collection. The kit contains natural crystals of various colours. Set includes: 1 plaster block with 8 natural crystals buried inside, 1 digging tool, 1 brush, 1 magnifier, containers for collection, fact card, 1 pouch & detailed instructions with fact sheet. Average crystal size: 15 to 20 mm. Colours and sizes may vary.