Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 Terahertz is a spectacular man

Terahertz is a spectacular man made ore

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

It is frequently fluorescent under ultraviolet light

limestone and copper

Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 Terahertz is a spectacular manThis 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.