Chiastolite

Where it forms, where it's found

110recorded occurrences

Source · OpenStreetMap

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 5 15.999 79.995
49.37%
13AlAluminium Aluminium 2 26.982 53.964
33.30%
14SiSilicon Silicon 1 28.085 28.085
17.33%
Total 162.044 100.00%
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	5	15.999	79.995	49.37%
13AlAluminium	Aluminium	2	26.982	53.964	33.30%
14SiSilicon	Silicon	1	28.085	28.085	17.33%
	Total	162.044	100.00%

Synonyms

Chiastolit
Chiastolith
Chyastolith
Cross-stone
Crucite
Crucite (of Delamétherie)
Crusit
Crusite
Lapis Crucifer
Macle
Maltesit
Maltesite
Quiastolita
Stealite

Literature, links & citation

Citations

1609de Boodt, B. (1609) Gemmarum et lapidum historia. Typis Wechelianis apud Claudiam Marnium & heredes Ioannis Aubris, Hanoviae (Hanau, Alemania), 215. (as lapis crucifer in Latin edition; as pierre qui porte une croix in French edition)
1717Mercati, M. (1717) Metallotheca. Mariam Salvioni, Vaticano. 237-239. (as lapis crucifer)
1754Torrubia, José (1754) El Aparato para la Historia Natural Española..
1834Jackson, C.T. (1834) An Account of the Chiastolite or Macle of Lancaster. Boston Journal of Natural History, 1, 55-62.
2003Carr, P.F. (2003) Chiastolite – andalusite or pseudomorphs after andalusite? Australian Journal of Mineralogy, 9, 91-96.

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Chiastolite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/chiastolite-1001},
  note      = {Accessed 2026-05-11}
}