Heliodor

Be3Al2(Si6O18)
Also known as
  • Golden Beryl
  • Heliodore
Variety of
Beryl
BerylBe3Al2Si6O18

Where it forms, where it's found

118recorded occurrences
Source · OpenStreetMap

Safety & handling

Physical

Colour
Golden Yellow

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen1815.999287.982
53.58%
14SiSiliconSilicon628.085168.510
31.35%
13AlAluminiumAluminium226.98253.964
10.04%
4BeBerylliumBeryllium39.01227.036
5.03%
Total537.492100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From Mindat formula

Synonyms

  • Golden Beryl
  • Heliodore

Literature, links & citation

Citations
  1. 1888S.L.Penfield (1888), Amer. J. Sci, ser.3 36, 317
  2. 1912Kaiser, E. (1912): Eine neues Beryll (Aquamarin)-Vorkommen in Deutsch-Südwestafrika. Centrbl. Mineral etc., 1912, 385-390.
  3. 2001Jahn, Steffen (2001): Goldberyll (Heliodor) vom Hoffnungsstrahl-Pegmatite bei Rössing. in Jahn et al (eds): Namibia. Zauberwelt edler Steine und Kristalle. Bode Verlag. 2001, p 119
  4. 2014Fridrichová, Jana; Bačík, Peter; Rusinová, Petra; Miglierini, Marcel; Bizovská, Valéria; Antal, Peter (2014) Crystal-chemical effects of heat treatment on aquamarines and yellow beryl from Thanh Hoa Province, Vietnam, in Abstract Book. 4th Central-European Mineralogical Conference (CEMC), 23-26 April 2014, Skalský Dvůr (Česká republika), Masaryk University . 39
  5. 2016Platonov, A., Khomenko, V., Taran, M. (2016) Crystal Chemistry, Optical Spectra and Color of Beryl. I. Heliodor and Golden Beryl — Two Varieties of Natural Yellow Beryl. Mineralogical Journal, 38 (2). 3-14 doi:10.15407/mineraljournal.38.02.003DOI: 10.15407/mineraljournal.38.02.003
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Heliodor — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/heliodor-6727},
  note      = {Accessed 2026-05-11}
}