Dig! Discover Crystal Mines (Emerald and Topaz) Experience the thrill of discovery with Dig! Discover Crystal Mines (Quartz and Aquamarine) kit from Kristal Educational. Unearth 15 gem and mineral specimens using the same techniques as real scientists. Each kit grows one ''quartz'' crystal cluster and one ''aquamarine'' crystal cluster, both up to 4-inches in diameter. Each kit contents an excavation block, 15 real gems and minerals, brush, excavation tool, crystal growing chemicals, and display tray. Additional items may be required. For ages 12 and up - Instruction booklet included