Rough Blue Topaz / 6-20mm AVG - 1 KILO LOT

Quantity: 1 kilogram

Average size range: 6 to 20 millimeters

Topaz is a naturally colorless gemstone containing aluminum and fluorine, although trace amounts of other elements can turn it a very pale blue or brown. Most commercially-available topaz has been treated with heat or very small amounts of radiation to enhance the natural color, resulting in the signature blue color topaz is now known for.