Quadratite

Comments: Tabular crystals of quadratite with small silvery gray, rounded crystals of galena.
Location: Lengenbach quarry, Binntal, Wallis (Valais), Switzerland. Scale: Picture size 0.8 mm.
© Thomas Witzke / Abraxas-Verlag

Quadratite

Comments: Aggregate of 3 black tabular crystals of quadratite (reflecting light) on jordanite/lengenbachite and white dolomite.
Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Crystal size 0.2 mm.
© Walter Gabriel

Quadridavyne

Comments: Colorless hexagonal crystals of quadridavyne.
Location: Ettringer Bellerberg, Ettringen, near Mayen, Eifel Mts, Rhineland-Palatinate, Germany. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Quartz   Calcite

Comments: Purple-colored druse of amethystine quartz and white calcite.
Location: Rio Grande do Sul, Brazil. Scale: Sample size 20 cm.
© Dave Barthelmy

Quartz   Chalcopyrite

Comments: Well-formed crystals of chalcopyrite and quartz.
Location: Boldut mine, 61 level (350 meters deep), Cavnic, Maramures, Rumania. Scale: 5.5 x 3.5 cm.
© Fabre Minerals

Quartz   Ilvaite

Comments: Black, prismatic ilvaite with quartz.
Location: First Sovietskij mine, Dalnjegorsk, Russia. Scale: 3.5 x 4.5 cm.
© Fabre Minerals

Quartz

Comments: Crystal druse of transparent quartz crystals.
Location: Hot Springs, Arkansas, USA. Scale: Specimen size 6 cm.
© Dave Barthelmy

Quartz   Fluorapatite

Comments: Purple crystal of fluorapatite on slightly smoky quartz crystals. Former Dr. E.E. David and Houston Museum collections.
Location: Pech, Kunar Province, Nuristan, Afghanistan. Scale: Crystal size 3.0 x 2.1 x 1.7 cm.
© Ed Rosenzweig

Quartz   Epistilbite

Comments: White epistilbite cluster 25 mm across on amethyst quartz crystal matrix.
Location: Sawda, Jalgaon, Maharashtra, India. Scale: 10x8x5 cm.
© John Betts - Fine Minerals

Quartz

Comments: Slightly smokey quartz overgrown with rose quartz. Note the exceptional transparency of the rose quartz.
Location: Lavra da Ilha, Taquaral, Minas Gerais, Brazil. Scale: 10 cm by 5.2 cm.
© Kevin Ward

Queitite

Comments: White earthy queitite masses on quartz.
Location: Tombstone, Cochise County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Quenselite

Comments: Square crystal of quenselite on matrix.
Location: Langban, Sweden. Scale: Crystal size 1 mm.
© John Veevaert

Quenselite

Comments: Jet black tabular crystals of quenselite, some striated on matrix.
Location: Langban, Varmland, Sweden. Scale: Crystal size 1.75mm.
© Tom Loomis / Dakota Matrix

Quenstedtite

Comments: White crystalline quenstedtite crust.
Location: Richelsdorf, Hessen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Quetzalcoatlite

Comments: Green encrustation of quetzalcoatlite.
Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag

Quintinite-2H   Quintinite-3T

Comments: Pale brownish crystals of quintinite, 2H or 2T polytype unknown.
Location: Jacupiranga Mine, S?o Paulo, Southeast Region, Brazil. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Quintinite-3T   Quintinite-2H

Comments: Pale brownish crystals of quintinite, 2H or 2T polytype unknown.
Location: Jacupiranga Mine, S?o Paulo, Southeast Region, Brazil. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag