4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch Moss and this phenomenon is thought

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

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

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

sold a piece of Green Tourmaline to Tiffany & Co

It was named and first described by the Greek philosopher and botanist Theosphrastus in 315 BCE

4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch Moss and this phenomenon is thoughtThis 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.