Blue Sapphire - Tumble Quality:Staff Pick Copper Nail Diameter: 5

Copper Nail Diameter: 5

The pyrite cubes in Navajún form in a sedimentary rock matrix of marlstone

the LED turns a solid green and the battery should be removed from the charger

Country of Manufacture: Kachin state

W28-400 grit

Blue Sapphire - Tumble Quality:Staff Pick Copper Nail Diameter: 5Mined from: India Description: Sapphire is a precious gemstone belonging to the corundum family, which is a crystalline form of aluminum oxide. It is the second hardest natural mineral, ranking 9 on the Mohs scale, just below diamond. The color of blue sapphires is caused by the presence of trace amounts of titanium (Ti) and iron (Fe), which replace some of the aluminum atoms in the crystal lattice. These titanium and iron ions absorb certain