Cymophane

Where it forms, where it's found

2recorded 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

Cat's Eye Chrysoberyl
Chrysolite Cat's-eye
Cymophanit
Cymophanita
Cymophanite

Literature, links & citation

Citations

1798Haüy (1798), Journa ines: 4: 5.
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.
2023Rybnikova, Olena, Bačík, Peter, Uher, Pavel, Fridrichová, Jana, Lalinská‐Voleková, Bronislava, Kubernátová, Monika, Hanus, Radek (2023) Characterization of chrysoberyl and its gemmological varieties by Raman spectroscopy. Journal of Raman Spectroscopy, 54 (8). 857-870 doi:10.1002/jrs.6566DOI: 10.1002/jrs.6566

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Cymophane — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/cymophane-7481},
  note      = {Accessed 2026-05-11}
}