Also known as Heliodor (which is derived from the Greek word for "sun"), yellow beryl is a member of the Beryl family. Colours range from a bright, warm golds to lighter, cooler tones. This lively and cheerful gemstone is usually quite modestly priced and is generally available in larger sizes of 2ct to over 10ct.
Locations where Heliodor is currently mined include; Madagascar, Brazil, Russia, Namibia and the USA.
Mohs’ Hardness: 7.5 - 8
Specific Gravity: 2.68-2.80
Refractive Index: 1.563-1.582
Optic Sign & Character: Uniaxial Negative
ICA Code: N, E or T
Treatments: Heated and/or Irradiation
Purpose: To intensify colour
Special Care: Avoid thermal shock
Possible Imitations: Synthetic Quartz, CZ and Glass