Blue Sapphire - Tumble childbirth Description: By far

Description: By far

the first ring of this design I carved weighed about 2 ounces

Many of the higher grade fire opals in this lot are contraluz specimens

Era: Tertiary

often referred to as a loupe

Blue Sapphire - Tumble childbirth Description: By farMined 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