Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 limestone and copper

limestone and copper

Terahertz is a spectacular man made ore

These inclusions range broadly in type and color and produce patterns that can look like gardens

Princess Patricia of Connaught

and forms within a host rock such as ironstone or sandstone

Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 limestone and copperThis 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.