Gemmology
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Quartz — specimens [gallery view] (Page 2)


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).
Amethyst — specimen 0612
0612
Uruguay
Amethyst — specimen 0344
0344
Uruguay
Amethyst — specimen 0402
0402
no precise locality
Amethyst — specimen 0224
0224
Brazil
Amethyst — specimen 0368
0368
no precise locality
Amethyst — specimen 0091
0091
Zambia
Amethyst — specimen 0193
0193
no precise locality
Amethyst — specimen 0199
0199
no precise locality
Amethyst — specimen 0232
0232
no precise locality
Amethyst — specimen 0169
0169
Zambia

Quartz — specimens — 229
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