 Jasper 105
Square - From £30.40
Noreena Jasper is a silicified mudstone found only in the Pilbara region of Western Australia, some 700 miles north of the capital, Perth. It comes from the same geological formation as Munjina Stone and was deposited around 2770 million years ago. Size: 4.5cm.
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Jasper 106
Landscape - From £19.00
Although known in the trade as Starburst Jasper this image is actually of a decorative form of rhyolite, a volcanic rock that is rich in silica. When it cools slowly, microscopic crystals form in the lava resulting in the spherical and nodular formations seen here.
Size: 6cm.
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Jasper 104
Square - From £30.40
Many minerals are hard to name accurately without chemical evaluation: this material comes from Mexico and is known commercially as 'Dunes Jasper' although it is technically a form of rhyolite, a volcanic rock. Size: 5cm.
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Jasper 103
Landscape - From £15.20
Jasper is an opaque, colourful form of chalcedony that forms by deposition from low-temperature, silica-rich waters percolating through cracks and fissures in other rocks. This example, known as 'poppy jasper', comes from the foothills of the Santa Cruz mountains in California. Size: 3cm.
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Jasper 101
Landscape - From £22.80
Jasper is an opaque, colourful form of chalcedony that forms by deposition from low-temperature, silica-rich waters percolating through cracks and fissures in other rocks. Other minerals are caught up in the process, giving jasper a wide range of colours. Size: 3cm.
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