Pietersite

Where it forms, where it's found

1recorded occurrences

Source · OpenStreetMap

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

Tempest stone
Touchonite

Literature, links & citation

Citations

1995Glas, Maximilian (1995) In Tucson erstmals vorgestellt: Pietersit - ein neuentdeckter Ornamentstein aus Namibia [Presented for the first time in Tucson: Pietersite – a newly discovered ornamental stone from Namibia]. Lapis, 20 (5). 7
2010Hu, Kaifan, Heaney, Peter J. (2010) A Microstructural Study of Pietersite from Namibia and China. Gems & Gemology, 46 (4) 280-286 doi:10.5741/gems.46.4.280DOI: 10.5741/gems.46.4.280

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Pietersite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/pietersite-27262},
  note      = {Accessed 2026-05-11}
}