Chlorastrolite

Ca2MgAl2(Si2O7)(SiO4)(OH)2·H2O
Also known as
  • Chlorastrolit
  • Clorastrolita
  • Green Starstone
  • +1 more

Where it forms, where it's found

19recorded occurrences
Source · OpenStreetMap

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen1415.999223.986
47.59%
14SiSiliconSilicon328.08584.255
17.90%
20CaCalciumCalcium240.07880.156
17.03%
13AlAluminiumAluminium226.98253.964
11.46%
12MgMagnesiumMagnesium124.30524.305
5.16%
1HHydrogenHydrogen41.0084.032
0.86%
Total470.698100.00%

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

From Mindat formula

Synonyms

  • Chlorastrolit
  • Clorastrolita
  • Green Starstone
  • Turtle Back

Literature, links & citation

Citations
  1. https://www.mindat.org/a/chlorastrolite
  2. 1975Huber, Norman King (1975) The Geologic Story of Isle Royale National Park. Bulletin 1309 (1st ed.). US Geological Survey 66 pp. doi:10.3133/b1309 DOI: 10.3133/b1309
  3. 1975Norman King Huber(1975)
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Chlorastrolite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/chlorastrolite-11469},
  note      = {Accessed 2026-05-11}
}