Burnt amethyst

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 2 15.999 31.998
53.26%
14SiSilicon Silicon 1 28.085 28.085
46.74%
Total 60.083 100.00%
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	2	15.999	31.998	53.26%
14SiSilicon	Silicon	1	28.085	28.085	46.74%
	Total	60.083	100.00%

Synonyms

Gebrannter Amethyst
Madeiratopas

Literature, links & citation

Citations

1972Lehmann, G. (1972) Yellow color centers in natural and synthetic quartz. Physik der Kondensierten Materie: 13: 297-306.
1984Neumann, E. & Schmetzer, K. (1984): Mechanism of thermal conversion of color and color centers by heat treatment of amethyst. Neues Jahrbuch fuer Mineralogie, Monatshefte 1984, 272-282.
2006Trindade, N. M.; Rubo, R. A.; Saeki, M. J. & Scalvi, R. M. F. (2006): Optical absorption of heat-treated amethyst. Revista Brasileira de Aplicacoes de Vacuo 25, 59-63.

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Burnt amethyst — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/burnt-amethyst-40451},
  note      = {Accessed 2026-05-11}
}