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BOULDER OPAL SLAB

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A rare rough Queensland Boulder Opal Slab.  You never get unworked pieces like this for sale, so this really 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. Two photos are taken against the sun to show transparency.  Being unpolished it was dang near impossible to photograph the colour streaks in this piece, in any light.  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.  A super piece!

Location:
Queensland.

Dimensions:
9cm x 5.4cm x 0.8cm, 77g.

 

Opal: SiO2 · nH2O
Hydrated Silicon Dioxide.

 

$266 $280

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BOULDER OPAL SLAB

A rare rough Queensland Boulder Opal Slab.  You never get unworked pieces like this for sale, so this really 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. Two photos are taken against the sun to show transparency.  Being unpolished it was dang near impossible to photograph the colour streaks in this piece, in any light.  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.  A super piece!

Location:
Queensland.

Dimensions:
9cm x 5.4cm x 0.8cm, 77g.

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.

Check out more Opal for sale here.

Weight100 g
Dimensions10 × 10 × 10 cm
color

Rainbow

BOULDER OPAL SLAB

A rare rough Queensland Boulder Opal Slab.  You never get unworked pieces like this for sale, so this really 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. Two photos are taken against the sun to show transparency.  Being unpolished it was dang near impossible to photograph the colour streaks in this piece, in any light.  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.  A super piece!

Location:
Queensland.

Dimensions:
9cm x 5.4cm x 0.8cm, 77g.

Opal: SiO2 · nH2O
Hydrated Silicon Dioxide.

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