Crystopedia
IMA mineral species

Cryptomelane

K(Mn⁴⁺₇Mn³⁺)O₁₆

Oxide mineral.

BrownGray

Cryptomelane specimen
Kryptomelan2, Maroko.jpg · Wikimedia Commons (see file page for author & license)

Properties

🔷 Monoclinic
Chemical formulaK(Mn⁴⁺₇Mn³⁺)O₁₆
ElementsK, Mn, O
Crystal systemMonoclinic
Mohs hardness—
Density—
Streak—
Color—
IMA symbolCml
Nickel–Strunz class4.DK.05a

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

🌍 Where it's found

Type locality (where it was first described): Tombstone, United States

  • Type locality
  • Notable source / deposit
  • Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.

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