Koroit Boulder Opal

 

Origin: Australia, South West Queensland, Koroit Opal Field

 

Opal is a hydrated amorphous form of silica, an unusual stone is the sense that it is classified as a mineraloid, unlike other crystalline forms of silica known as minerals. Opal is subcategorised in 4 groups that includes a variable complex of stones. These interesting yellowish-brown opals are Classified as Opal -AG (Amorphous-Gel) A type of Opal consisting of aggregated spheres of amorphous silica, hydrated with water in between these structures.

 

The photos were taken in bright sunlight to bring out their best colours.

Koroit Boulder Opal - Australia

SKU: ROUG097
$6.00 Regular Price
$4.00Sale Price
  • Koroit Boulder Opal

    Origin: Australia, South West Queensland, Koroit Opal Field

    Size: 13 mm x 9 mm, 1.5 grams

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