Difference between revisions of "Heliodor"
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== Authority == | == Authority == | ||
| − | * | + | * Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982 |
| − | * | + | * 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 |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 06:49, 24 July 2013
Description
A golden yellow beryl stone most commonly found in southwest Africa. Heliodor has been used for Roman intaglios and gemstones.
Synonyms and Related Terms
Heliodor (Deut.)
Other Properties
Hexagonal crystal system. Conchoidal fracture.
Weakly pleochoric. May contain inclusions.
| Mohs Hardness | 7.5-8.0 |
|---|---|
| Density | 2.68-2.71 |
| Refractive Index | 1.57-1.86 |
Comparisons
Properties of Common Gemstones
Authority
- Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
- 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