Alexandrite

Where it forms, where it's found

25recorded occurrences

Source · OpenStreetMap

Safety & handling

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 4 15.999 63.996
50.40%
13AlAluminium Aluminium 2 26.982 53.964
42.50%
4BeBeryllium Beryllium 1 9.012 9.012
7.10%
Total 126.972 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From Mindat formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
8OOxygen	Oxygen	4	15.999	63.996	50.40%
13AlAluminium	Aluminium	2	26.982	53.964	42.50%
4BeBeryllium	Beryllium	1	9.012	9.012	7.10%
	Total	126.972	100.00%

Synonyms

Alexandrit
Alexandrita
Diaphanite

Literature, links & citation

Citations

—https://gem-a.com/wp-content/uploads/2025/02/JoG-Bibliography_2024_Chrysoberyl.pdf
1842Nordenskiöd (1842) Russ. Ges. Min. Schr.
1926Wild, Klemm (1926) Zentralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 31.
1944Palache, Charles, Berman, Harry, Frondel, Clifford (1944) The System of Mineralogy (7th ed.) Vol. 1 - Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, New York.
1965Farrell, E. F., Newnham, R. E. (1965) Crystal-field spectra of chrysoberyl, alexandrite, peridot and sinhalite. American Mineralogist, 50 (11-12) 1972-1981

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Alexandrite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/alexandrite-109},
  note      = {Accessed 2026-05-11}
}