Orange Calcite 10mm Round AAA Grade - 15-16 Inch 1 Strand The name "biotite" is used

The name "biotite" is used because these minerals generally cannot be distinguished without optical

they appear dark or black

which may form green stains or specks on Azurite crystals or aggregates

this unique Madagascar Agate rock specimen is perfect for gift giving or keep for yourself

Orange Calcite 10mm Round AAA Grade - 15-16 Inch 1 Strand The name "biotite" is usedCalcite is a rock forming mineral that is extremely common and found throughout the world in sedimentary, metamorphic, and igneous rocks. Calcite is the principal constituent of limestone and marble. These rocks are extremely common and make up a significant portion of Earth's crust.