Crystopedia
IMA mineral species

Roymillerite

Pb₂₄Mg₉(Si₁₀O₂₈)(CO₃)₁₀(BO₃)(SiO₄)(OH)₁₃O₅

Boro-silicate mineral.

PinkWhite & Clear

Properties

⚖ Density5.973 g/cm³
Very heavy
🔷 Triclinic
Chemical formulaPb₂₄Mg₉(Si₁₀O₂₈)(CO₃)₁₀(BO₃)(SiO₄)(OH)₁₃O₅
ElementsPb, Mg, Si, O, C, B, H
Crystal systemTriclinic
Mohs hardness—
Density5.973 g/cm³
Streak—
ColorRAL 3015
IMA symbolRoy

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

🌍 Where it's found

Type locality (where it was first described): Kombat, Namibia

  • 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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