Topaz Sky Blue 5mm Round - 8 Inch R1738 Calcite is the principal constituent

Calcite is the principal constituent of limestone and marble

Its inclusions of golden tones to rust to red are due to traces of hematite embedded in the stone

This turquoise is mined from the Sonora mines in Mexico

and the material has not been treated with dye

Usually occurring in a deep red color

Topaz Sky Blue 5mm Round - 8 Inch R1738 Calcite is the principal constituentTopaz is a rare silicate mineral and obtains much of its popularity from its beautiful colors and its status as a birthstone. Topaz occurs in a wide range of natural colors; however, most natural topaz is colorless. The most highly regarded colors are the reds and pinks, which receive their color from trace amounts of chromium. The name "topaz," and variants of the name in other languages, have been used for yellowish gemstones for at least two