BOULDER OPAL SLAB 1
In stock
A rare rough Queensland Boulder Opal Slab 1. You almost never get unworked pieces like this for sale. Really this is a gem in the rough. Features ethereal streaks of green, purple, blue and pink on a white background, wrapped in its sandstone host rock. I’ve done my best but it does look so much better in person. Polished up of course it will look absolutely stunning. A great project for the lapidary or opal enthusiast or jeweller or it could be for an investment collection. A super piece!
Location:
Queensland.
Dimensions:
9.2cm x 5.4cm x 0.6cm, 62g.
Opal: SiO2 · nH2O
Hydrated Silicon Dioxide.
$220
In stock
CompareBOULDER OPAL SLAB 1
A rare rough Queensland Boulder Opal Slab 1. You almost never get unworked pieces like this for sale. Really this is a gem in the rough. Features ethereal streaks of green, purple, blue and pink on a white background, wrapped in its sandstone host rock. I’ve done my best but it does look so much better in person. Polished up of course it will look absolutely stunning. A great project for the lapidary or opal enthusiast or jeweller or it could be for na investment collection. A super piece!
Location:
Queensland.
Dimensions:
9.2cm x 5.4cm x 0.6cm, 62g.
Opal: SiO2 · nH2O
Hydrated Silicon Dioxide.
Boulder Opal is a variety of Precious Opal. Found in Queensland, Australia, as cracks or coatings in and around ironstone/sandstone boulders. Opal has been a popular gem for many centuries and has a very interesting structure.
Opal is a mineraloid because this structure is not truly crystalline. The chemistry of Opal is primarily SiO2 and varying amounts of water. The amount of water varies from 5 -10% and greater. This water can help geologists determine the temperature of the host rock at the time the opal formed.