Quartz Mineral Gallery

Quartz: SiO2  
Calcite: CaCO3

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

Quartz: SiO2  
Chalcopyrite: CuFeS2

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: SiO2  
Ilvaite: CaFe++2Fe+++Si2O7O(OH)

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

Quartz: SiO2

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

Quartz: SiO2  
Apatite-(CaF): Ca5(PO4)3F

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: SiO2  
Epistilbite: CaAl2Si6O16·5(H2O)

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: SiO2

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