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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


Properties of Common Gemstones

Sources Checked for Data in Record

  • 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