Description: Danburite is the mineral contain elements: Ca, B, Si, O, Mohs hardness is 7-7.5. Danburite is little known as a gemstone, but its popularity is growing. Its crystals have excellent clarity, and they are easy to cut into brilliant attractive gems. This Danburite wide around 19cm, from Mexico. Danburite crystal is transparent, has bright luster, and obvious geometric shape. On the colorless and transparent Danburite cluster, covered many small pale-yellow Calcites. This is an excellent Danburite and Calcite combo specimen! Museum quality Danburite specimen!