IMA mineral species

Dalyite

K₂ZrSi₆O₁₅

Phyllosilicate mineral.

Dalyite specimen
Dalyite.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness7.5
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Harder than quartz: scratches glass and steel.

Chemical formulaK₂ZrSi₆O₁₅
ElementsK, Zr, Si, O
Crystal system—
Mohs hardness7.5
Density—
Streak—
Color—
IMA symbolDly
Nickel–Strunz class9.EA.25

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

🌍 Where it's found

Type locality (where it was first described): Ascension Island, realm of the United Kingdom

  • 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.