Tumbled Extra Quality Chocolate Calcite / 1-2" AVG - 1 KILO LOT Menu Coasters Amazonite is a potassium-based feldspar

Amazonite is a potassium-based feldspar

lapis lazuli has been in use for at least 9000 years

Rough Black Tourmaline on Black Cord

Assorted Gemstone Pocket Hearts

While the bulk of the stone is a royal blue often used in paint pigment

Tumbled Extra Quality Chocolate Calcite / 1-2" AVG - 1 KILO LOT Menu Coasters Amazonite is a potassium-based feldsparQuantity: 1 kilogram Average size range: 1 to 2 inch Chocolate calcite is more properly known as brown aragonite, a crystal that can be found in a surprising number of places. While most aragonite is mined from veins of metamorphic rock, it can also be found inside mollusk shells and on coral growths, and it is widely used when recreating reef conditions for aquariums.