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

greenish yellows

Mixed Impression Jasper is a composite made by fusing stone fragments using heat

Jade has been used for tens of thousands of years

Smoky Quartz is a translucent smoky brown or gray variety of Quartz

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

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.