Dendritic Black Opal 6mm Round 15-16 Inch hps_04092026 commonly known as Limestone

commonly known as Limestone

it offers a way to work a neutral color into your designs

It has been greatly sought after throughout history and was at times valued as highly as Diamond

and those that still exist today have been passed down for generations

intricate patterns of minute black flecks

Dendritic Black Opal 6mm Round 15-16 Inch hps_04092026 commonly known as LimestoneThis 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.