Calcite Crystal Rough - Iceland Spar

Choose in "Options":
- Rough Stone Size: 15 x 10mm / 5 to 9Gr
- Rough Stone Size: 20 x 15mm / 10 to 14Gr
- Rough Stone Size: 22 x 17mm / 15 to 17Gr

Mexico

Very clear calcite crystals (rhombs) shows double image refraction due to their high birefringence.