Dendritic Opal 3x6mm Heishi - 15-16 Inch rounds_part_four With a built-in stainless-steel needle

With a built-in stainless-steel needle

Black Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins

but it is opaque as well

particularly in beaded bracelets

Wild Horse was first found in the mid-90's near a remote copper mining city

Dendritic Opal 3x6mm Heishi - 15-16 Inch rounds_part_four With a built-in stainless-steel needleThis 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.