Dendritic Black Opal 6mm Round 15-16 Inch Size_2mm Agate is one of many

Agate is one of many varieties of banded Chalcedony

Black Spinel not only has the dark color

These inclusions create black and brown spots that resemble the random patterns found on its namesake

It has been greatly sought after throughout history and was at times valued as highly as Diamond

Ancient Egyptians sometimes buried their dead with amulets of Jasper for safe passage into the afterlife

Dendritic Black Opal 6mm Round 15-16 Inch Size_2mm Agate is one of manyThis variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns. These inclusions consist of iron, manganese and other metallic oxides captured during the forming of the rock. Opals are hydrated amorphous forms of silica, created when silica hardens within the fissures of other stones.