4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch Moss greenish yellows

greenish yellows

creamy white to pale gray or beige

Cuprite is a copper oxide mineral frequently found in association with copper deposits as well as azurite

and this phenomenon is thought to be due to impurities of yttrium or organic matter within the crystal lattice

Azurite is a soft

4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch Moss greenish yellowsThis 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.