Free shipping on Ethiopian Opal, 11.20 carats. Rough - Height: 28 mm - Width: 18 mm- 2.24 g
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Current bid
€ 16
No reserve price
Expert
Selected by Georgia Foteinou
Holds BSc in geology and post-graduate qualifications in geochemistry.
Estimate € 90 - € 140
19 other people are watching this object
 Bidder 9015 | €16 | |
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 Bidder 2649 | €11 | |
| Bidder 9015 | €9 | |
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This rough Ethiopian opal from Wello displays multicolour fire on a white yellowish base and is perfect for serious collectors.
AI-assisted summary
Description from the seller
Excellent natural Ethiopian rough opal. White yellowish base with multicolour fire. Top stone for collectors.
All pictures are taken with a high-resolution camera on dry bone material and on different backgrounds to depict the opal as realistically as possible.
Worldwide shipping with registered mail and tracking number.
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. Only precious opals show a variable interplay of internal colors.
At microscopic scales, precious opal is composed of silica spheres approximately 150 to 300 nm in diameter arranged in a hexagonal or cubic close-packed lattice. These ordered silica spheres produce the internal colors by causing interference and diffraction of light passing through the microstructure of the opal.
Excellent natural Ethiopian rough opal. White yellowish base with multicolour fire. Top stone for collectors.
All pictures are taken with a high-resolution camera on dry bone material and on different backgrounds to depict the opal as realistically as possible.
Worldwide shipping with registered mail and tracking number.
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. Only precious opals show a variable interplay of internal colors.
At microscopic scales, precious opal is composed of silica spheres approximately 150 to 300 nm in diameter arranged in a hexagonal or cubic close-packed lattice. These ordered silica spheres produce the internal colors by causing interference and diffraction of light passing through the microstructure of the opal.
Details
Main Mineral
Free shipping on Ethiopian Opal, 11.20 carats.
Mineral Form
Rough
Weight
2.24 g
Origin (Region/ City)
Hello
Country of Origin
Ethiopia
Height
28 mm
Width
18 mm
Depth
7 mm
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.
