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Australian Minerals, Opals, Rock 'n Slabs, Slabs, Slabs
Opal: SiO2 · nH2O
BOULDER OPAL SLAB 1
Availability:
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.
Check out more Opal for sale here.
| Weight | 100 g |
|---|---|
| Dimensions | 10 × 10 × 10 cm |
BOULDER OPAL SLAB
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.
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BOULDER OPAL POLISHED YOWAH
A Boulder Opal Polished Yowah Gem Stone. A great splash of rainbow coloured Opal to show off to your friends. This beauty has been cut by a local opal cutter and shows 3 dimensional form and contours. This Opal would suit jewellery in pendant or ring form. The cut is free form and the opal is solid.
Location:
Queensland, Australia.Dimensions:
1.2cm x 3.1cm x 0.57cm, 23.09ct.Opal: SiO2 · nH2O Hydrated Silicon Dioxide.
SKU: B1404 - Clearance Wholesale, Opals
BOULDER OPAL ROUGH PARCEL (original)
Boulder Opal Rough Parcel. A selection of Opals in blue and purple colour. Ready for jewellery making or as specimens. A collection from various jars with great variety of colour and Queensland locations. This lot of rocks are from Boulder Opal gemstone. Photos are with dry and wet stones outside. This is a mixed parcel of Boulder Opal from various locations in Queensland. Some of these pieces have opal on several sides of the matrix rock. These lots are popular as always at a bargain price.
Dimensions:
5 Pieces, 825g.Location:
Queensland, Australia.Opal: SiO2
nH2O Hydrated Silicon Dioxide.SKU: E4708 - Clearance Wholesale, Opals, Top Shelf
BOULDER OPAL POLISHED PARCEL 4
Boulder Opal Polished Parcel 4. Opals in green, blue, orange, purple a rainbow of colors in the parcel. Ready for jewellery making or as specimens. A collection with great variety of colour and Queensland locations cut and polished by local Sydney Opal Cutter. This lot of polished are from Boulder Opal gemstone. Photos are with dry stones outside. This is a mixed parcel of Boulder Opal from various locations in Queensland. These lots are popular as always at a bargain price.
My photos do no justice to many of these polished Opals, in real life with natural light they look much better with sharper colors. Some have letters on the back for an indication of locations within Queensland. We have taken pics of both sides of the Opals shown on the black background.Dimensions:
4 Pieces, 15.85g.
Blue Green 3.3cm x 1.9cm x 0.7cm, 8.11g.
Purple 1.3cm x 1.9cm x 0.4cm, 1.64g.
Blue Green 3.1cm x 1.5cm x 0.5cm, 3.51g.
Orange 2.4cm x 1.4cm x 0.5cm, 2.58g.Location:
Queensland, Australia.Opal: SiO2
nH2O Hydrated Silicon Dioxide.SKU: BJ1191 - Opals, Rock 'n Slabs, Rocks
DENDRITIC AGATE MERLINITE ROCK
DENDRITIC AGATE MERLINITE ROCK
A good chunk of Dendritic Agate Merlinite Rock, also called common Opal and Dendritic Opal. This solid rock is ready for lapidary work or carving. The beautiful patterns in the stone would look great in jewellery. A very nice Australian rock. This Specimen has been mounted on a perspex pad for enhanced display.
Location:
Western Australia, Australia.Dimensions:
11.8cm x 8.5cm x 6.7cm, 638g.Opal: SiO2.
nH2O Hydrated Silicon Dioxide.
SKU: B0207 - Opals, Spheres
BOULDER OPAL SPHERE
BOULDER OPAL SPHERE
An amazing Boulder Opal Sphere! Featuring beautiful seams of swirling colours of opal amid the host rock. Showing thick seams of great coloured Opal, this specimen is outstanding and very collectable.
Location:
Queensland, Australia.Dimensions:
Sphere 8.4cm diameter, 862g.Opal: SiO2 · nH2O Hydrated Silicon Dioxide.
SKU: BLDOPL05
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SiO2 · nH2O.A colourless variety of Opal. Hyalite is opal, an amorphous silica glass containing about 3-8% water. Hyalite occurs as globular and botryoidal masses and irregular crusts. Found in volcanic and pegmatite environments where the silica deposits from the gas phase. It often shows a strong green fluorescence in UV light.
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