Yellow Calcite 10mm Round A Grade - 15-16 Inch bicone_beads Many stones in the Russian

Many stones in the Russian crown jewels from the 17th century which were thought to be rubies are actually red Tourmaline

are more special than most

Crazy Lace Agate is often dyed to produce colors that do not naturally occur in the stone

from light blue to lapis blue to cobalt

orange and rust are due to traces of hematite within the stone

Yellow Calcite 10mm Round A Grade - 15-16 Inch bicone_beads Many stones in the RussianCalcite 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.