Qandilite

Qandilit

(Mg, Fe²⁺)₂(Ti, Fe³⁺, Al)O₄

cubic

Qilianshanite

Qilianshanit

NaHCO₃ • H₃BO₃ • 2H₂O

monoclinic

Qingheiite

Qingheiit

Na₂(Mn²⁺, Mg, Fe²⁺)₂(Al, Fe³⁺)(PO₄)₃

monoclinic

Qitianlingite

Qitianlingit

(Fe²⁺, Mn²⁺)₂(Nb, Ta)₂W⁶⁺O₁₀

orthorhombic

Quadratit

Kvadratit

Ag(Cd, Pb)(As, Sb)S₃

tetragonal

Quadridavyne

Kvadridavyn

(Na, K)₆Ca₂Si₆Al₆O₂₄Cl₄

hexagonal

Quadruphite

Kvadrufit

Na₁₄CaMgTi₄(Si₂O₇)₂(PO₄)₄O₄F₂

triclinic

Quartz

Kvarc

SiO₂

trigonal

Queitite

Queitit

Pb₄Zn₂(SiO₄)(Si₂O₇)(SO₄)

monoclinic

Quenselite

Quenselit

PbMn³⁺O₂(OH)

monoclinic

Quenstedtite

Quenstedtit

Fe³⁺₂(SO₄)₃ • 10H₂O

triclinic

Quetzalcoatlite

Quetzalcoatlit

Zn₈Cu²⁺₄(Te⁴⁺O₃)₃(OH)₁₈

hexagonal

Quintinite

Quintinit

Mg₄Al₂(OH)₁₂CO₃ • 3H₂O

hexagonal, trigonal