Madagascar Dendiritc Green Opal 6mm Round A Grade - 15-16 Inch 6X8 Gem Silica is the rarest

Gem Silica is the rarest and highest form of Chrysocolla

red to violet

Viking and Germanic legend tell that the sword of the hero Siegfried

often called the "Super Seven" or "Melody Stone" contains Amethyst

Madagascar Dendiritc Green Opal 6mm Round A Grade - 15-16 Inch 6X8 Gem Silica is the rarestThis 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.