Difference between revisions of "Heliodor"
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| + | [[File:Yellow beryl MFA 2012.842.jpg|thumb| Ring with yellow beryl<br>MFA# 2012.842]] | ||
== Description == | == Description == | ||
A golden yellow [[beryl]] stone most commonly found in southwest Africa. Heliodor has been used for Roman intaglios and [[gemstone|gemstones]]. | A golden yellow [[beryl]] stone most commonly found in southwest Africa. Heliodor has been used for Roman intaglios and [[gemstone|gemstones]]. | ||
| − | + | [[File:Heliodor-G-EmpireTheWorldOfGems.jpg|thumb| Golden beryl from [ http://www.g-empire.de Empire of the World of Gems]]] | |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | Heliodor (Deut.) | + | golden beryl; yellow beryl; Heliodor (Deut.) |
== Physical and Chemical Properties == | == Physical and Chemical Properties == | ||
| − | * Hexagonal crystal system. | + | * Hexagonal crystal system. Crystals are generally flawless |
* Conchoidal fracture. | * Conchoidal fracture. | ||
* Weakly pleochoric. | * Weakly pleochoric. | ||
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==Resources and Citations== | ==Resources and Citations== | ||
| − | + | * Gem Identification Lab Manual, Gemological Institute of America, 2016. | |
| + | * Mineralogy Database: [http://www.webmineral.com/data/Beryl.shtml Beryl] | ||
* Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982 | * Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982 | ||
| − | + | * Wikipedia: [https://en.wikipedia.org/wiki/Beryl Beryl] (Accessed Oct. 18, 2005 and Dec 2022) | |
* Thomas Gregory, ''The Condensed Chemical Dictionary'', Reinhold Publishing, New York, 3rd ed., 1942 | * Thomas Gregory, ''The Condensed Chemical Dictionary'', Reinhold Publishing, New York, 3rd ed., 1942 | ||
| − | |||
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 101 | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 101 | ||
Revision as of 14:22, 21 December 2022
Description
A golden yellow Beryl stone most commonly found in southwest Africa. Heliodor has been used for Roman intaglios and gemstones.
Golden beryl from [ http://www.g-empire.de Empire of the World of Gems]
Synonyms and Related Terms
golden beryl; yellow beryl; Heliodor (Deut.)
Physical and Chemical Properties
- Hexagonal crystal system. Crystals are generally flawless
- Conchoidal fracture.
- Weakly pleochoric.
- May contain inclusions.
| Mohs Hardness | 7.5-8.0 |
|---|---|
| Density | 2.68-2.71 g/ml |
| Refractive Index | 1.57-1.86 |
Comparisons
Properties of Common Gemstones
Resources and Citations
- Gem Identification Lab Manual, Gemological Institute of America, 2016.
- Mineralogy Database: Beryl
- Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
- Wikipedia: Beryl (Accessed Oct. 18, 2005 and Dec 2022)
- Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 101