topaz
nesosilicate mineral
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Summary
topaz is a mineral species[1]. topaz ranks in the top 0.84% of mineral species entities by monthly Wikipedia readership (7,491 views/month, #12 of 1,431).[2]
Key Facts
- Named after: St. John's Island, Egypt[3]
- Chemical formula: Al₂SiO₄F₂[4]
- Subclass of: nesosilicates[5], cyclosilicates[6]
- Commons category: Topaz[7]
- Streak color: white[8]
- Crystal system: orthorhombic crystal system[9]
- IMA status and/or rank: grandfathered mineral (G)[10]
- Strunz 8th edition (series ID, updated): VIII/A’.03[11]
- Nickel-Strunz 9th edition (updated 2009): 9.AF.35[12]
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 9.AF.35[13]
- Mohs' hardness: 8[14]
- Described by source: Bible Encyclopedia of Archimandrite Nicephorus[15], Brockhaus and Efron Encyclopedic Dictionary[16], Small Brockhaus and Efron Encyclopedic Dictionary[17], Explanatory Dictionary of the Living Great Russian Language[18], De topasio vera Saxonum, orientali non inferiore[19], Mineralogia, eller mineralriket indelt och beskrifvet[20], Encyclopædia Britannica 11th edition[21], The New Student's Reference Work[22]
- Different from: Topaz[23]
- Density: 3.530 gram per cubic centimetre[24]
- On focus list of Wikimedia project: Wikipedia:Vital articles/Level/4[25]
- IMA Mineral Symbol: Tpz[26]
Body
Works and Contributions
Things named for topaz include Topaz[27], a submarine[28], in France[29].
Why It Matters
topaz has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[30] topaz is known by 38 alternative names across languages and contexts.[31]
Entities named for topaz include Topaz[27], a submarine[28], in France[29].