Smaragdite

Where it forms, where it's found

19recorded occurrences

Source · OpenStreetMap

Physical

Lustre: Vitreous
Colour: Emerald green
Streak: white
Cleavage: Perfect

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 24 15.999 383.976
28.41%
26FeIron Iron 5 55.845 279.225
20.66%
24CrChromium Chromium 5 51.996 259.980
19.24%
14SiSilicon Silicon 8 28.085 224.680
16.62%
12MgMagnesium Magnesium 5 24.305 121.525
8.99%
20CaCalcium Calcium 2 40.078 80.156
5.93%
1HHydrogen Hydrogen 2 1.008 2.016
0.15%
Total 1351.558 100.00%
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	24	15.999	383.976	28.41%
26FeIron	Iron	5	55.845	279.225	20.66%
24CrChromium	Chromium	5	51.996	259.980	19.24%
14SiSilicon	Silicon	8	28.085	224.680	16.62%
12MgMagnesium	Magnesium	5	24.305	121.525	8.99%
20CaCalcium	Calcium	2	40.078	80.156	5.93%
1HHydrogen	Hydrogen	2	1.008	2.016	0.15%
	Total	1351.558	100.00%

Synonyms

Smaragdit
Smaragdita

Literature, links & citation

Cite this entry

Entry last updated August 11, 2025

@misc{mineral2025,
  author    = {Mineral Index editorial board},
  title     = {Smaragdite — Mineral Index},
  year      = {2025},
  url       = {https://mineralindex.org/minerals/smaragdite-11016}
}