This listing is for ten (10) prospector mining bag (gemstone mining, crystal mining). This kit contains 12-15 crystals/gemstones within the mix. Use the drop down bar to select if you want sand or no sand. If you choose sand, each kit will come with approximately 3lbs of sand along with the gemstones. The gemstones will already be mixed within the sand and ready to mine! Average crystal size: 0.75" - 2" Each order is package with love and care. If you have any questions, feel free to message or email us.