Akoya is a type of marine cultured pearl.

Recently, a new mineral called Laurentthomasite

A sapphire of padparajas is a kind of pinkish-orange corundum, due to which it is isolated from the total mass of other colored sapphires. Unusual and very beautiful color dramatically affect the price of this stone - compared with other colored sapphires, it has a higher price.

The CVD process is based on the decomposition of hydrocarbons (usually methane) in a mixture with hydrogen and the subsequent deposition of diamond on a heated substrate.

Everyone knows a stone called "tanzanite" and its characteristic blue-violet color, reminiscent of the color of sapphire.