Gemmology
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Quartz — specimens [gallery view] (Page 22)


Quartz is the most common mineral found on the surface of the Earth. In hydrothermal veins, epithermal to alpine; characteristic of granites and granite pegmatites; in sandstones and quartzites, less abundant in other rock types; in hydrothermal metal deposits. Common in carbonate rocks; a residual mineral in soils and sediments (Anthony et al., 2001—2005). There are faceted specimens of 7000 carats (Arem, 1987: 159).
Rose quartz — specimen 0701
0701
Africa
Rose quartz — specimen 0175
0175
Africa
Rose quartz — specimen 0188
0188
Africa
Rose quartz — specimen 0242
0242
Africa
Smoky quartz — specimen 0362
0362
Brazil
Smoky quartz — specimen 0674
0674
Brazil
Smoky quartz — specimen 0251
0251
no precise locality
Smoky quartz — specimen 0682
0682
Brazil
Smoky quartz — specimen 0202
0202
Brazil
Smoky quartz — specimen 0204
0204
no precise locality

Quartz — specimens — 229
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