File:Opal-53714.jpg · Wikimedia Commons · See Wikimedia Commons
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Sign in to savethumb|alt=A map of the world displaying the countries where opal is most commonly found; Australia, Ethiopia, Brazil, Mexico and the United States of America are highlighted.|Main opal producing countries
AI overview
Opal is a gemstone prized for its distinctive play of colors and is mined in several countries around the world, with Australia, Ethiopia, Brazil, Mexico, and the United States being the primary producers. It matters because it is valued as a precious stone used in jewelry and decorative items.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Mineral.fluorescence
- black or white body color: inert to white to moderate light blue, green, or yellow in long and short wave, may also phosphoresce, common opal: inert to strong green or yellowish green in long and short wave, may phosphoresce; fire opal: inert to moderate greenish brown in long and short wave, may phosphoresce
- Mineral.absorption
- green stones: 660 nm, 470 nm cutoff
- Mineral.streak
- White
- Mineral.density
- 2.09 g/cm3
- Mineral.diagnostic
- darkening upon heating
- Mineral.solubility
- hot salt water, bases, methanol, humic acid, hydrofluoric acid
- Mineral.diaphaneity
- opaque, translucent, transparent
- Mineral.name
- Opal
- Mineral.category
- Mineraloid
- Mineral.boxbgcolor
- 5cc4e7
- Mineral.image
- Opal-53714.jpg
- Mineral.alt
- A blue-green section of opal encased inside a light brown rock
- Mineral.caption
- A rich seam of iridescent opal encased in matrix
- Mineral.formula
- Hydrated silica. SiO2·nH2O
- Mineral.IMAsymbol
- Opl
- Mineral.color
- Colorless, white, yellow, red, orange, green, brown, black, blue, pink
- Mineral.habit
- Irregular veins, in masses, in nodules
- Mineral.system
- Amorphous
via Wikipedia infobox
Wikidata facts
- Subclass of
- tectosilicates
- Named after
- gemstone
- Image
- Opal banded.jpg
Show 11 more facts
- Commons category
- Opal
- chemical formula
- SiO₂·nH₂O
- Nickel-Strunz 9th edition (updated 2009)
- 4.DA.10
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 4.DA.10
- Commons gallery
- Opal
- streak color
- white
- crystal system
- amorphous solid
- topic's main category
- Category:Opals
- IMA Mineral Symbol
- Opl
- described at URL
- hedendaagsesieraden.nl/2023/04/10/opaal
- Strunz 8th edition (series ID, updated)
- IV/D.01c
via Wikidata · CC0
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