2 Piece Australian Boulder Opal

2 Piece Australian Boulder Opal

SKU: 800-2004181

Natural beauty exudes from this two piece Australian boulder opal. Australian boulder opals are the second most valuable type of opal, following black opal. A truly unique and beautifully natural accent to complement the decor of your office or home. 

Opal is a hydrated amorphous form of silica. The water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Because of the amorphous character of opal, it is classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. Opal is the national gemstone of Australia.


Piece 1 = 6.5 in x 4.5 in x 4.5 in
Piece 2 = 3.5 in x 3.25 in x 1.25in



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