Ct. 88.0 Australian Rough Opal - Rough- 17.6 g
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Grezzo Australian rough opal from Lightning Ridge, Australia, weighing 17.60 g.
AI-assisted summary
Description from the seller
Natural Australian Rough Opals.
Dimensions from 7.0 mm to. 16.0 mm approx.
Please, note that the photos were taken on both dry and wet opal. Obviously, the wet opal is brighter and more colorful, highlighting the effect that can be achieved after polishing. In Australian mining practice, rough opal is conventionally photographed wet to represent the potential of the stone. For this reason, we encourage you to carefully evaluate the photographs before bidding. Thank you for your attention and happy bidding!
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An opal is a hydrated form of silica with a water content ranging from 3 to 21%.Indeed, it is this permeability to water that makes it a hydrophile.
Opals are 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. Precious opals show a variable interplay of internal colors.
At microscopic scales, precious opal is composed of silica spheres some 150 to 300 nm in diameter in a hexagonal or cubic close-packed lattice. These ordered silica spheres produce the internal colors by causing the interference and diffraction of light passing through the microstructure of the opal.
Natural Australian Rough Opals.
Dimensions from 7.0 mm to. 16.0 mm approx.
Please, note that the photos were taken on both dry and wet opal. Obviously, the wet opal is brighter and more colorful, highlighting the effect that can be achieved after polishing. In Australian mining practice, rough opal is conventionally photographed wet to represent the potential of the stone. For this reason, we encourage you to carefully evaluate the photographs before bidding. Thank you for your attention and happy bidding!
_________________________
An opal is a hydrated form of silica with a water content ranging from 3 to 21%.Indeed, it is this permeability to water that makes it a hydrophile.
Opals are 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. Precious opals show a variable interplay of internal colors.
At microscopic scales, precious opal is composed of silica spheres some 150 to 300 nm in diameter in a hexagonal or cubic close-packed lattice. These ordered silica spheres produce the internal colors by causing the interference and diffraction of light passing through the microstructure of the opal.
Details
Main mineral
Ct. 88.0 Australian Rough Opal -
Mineral form
Rough
Weight
17.6 g
Origin (region/city)
Lightning Ridge
Country of origin
Australia
Disclaimer
It is believed that certain gemstones and minerals have beneficial health and spiritual properties. However, using or wearing gemstones or minerals does not mean that you can treat, cure or prevent any disease. Please consult your health care professional for information on health care issues and do not stop any medications or courses of treatment, without first consulting your health care professional. The use of gemstones or minerals as a wellness therapy is one of personal choice. While stones or crystals have been used historically to relieve or prevent symptoms, the objects sold on our website offer no guarantee of results. Therefore, Catawiki cannot guarantee or be held liable for the effectiveness of these objects sold herein.
It is believed that certain gemstones and minerals have beneficial health and spiritual properties. However, using or wearing gemstones or minerals does not mean that you can treat, cure or prevent any disease. Please consult your health care professional for information on health care issues and do not stop any medications or courses of treatment, without first consulting your health care professional. The use of gemstones or minerals as a wellness therapy is one of personal choice. While stones or crystals have been used historically to relieve or prevent symptoms, the objects sold on our website offer no guarantee of results. Therefore, Catawiki cannot guarantee or be held liable for the effectiveness of these objects sold herein.
