Composition: Silicon oxide
Nomenclature: Named after the German word quarz (or quarzum), of uncertain derivation.
Industrial Uses: Gemstones, carvings, electronics, high-temperature glass, crushed stone.
Additional Notes: The second most common mineral on Earth (feldspar is the most common). Literally hundreds of varieties of quartz exist including agate, jasper, amethyst, opal, citrine, etc. Quartz has a wide variety of uses, and is one of the most studied minerals due to its myriad uses.
Afars & Issas : Scott 351 : 25 francs : 26 Apr 1971
Quartz (geode)
Algeria : Scott 712 : 1.20 dinar : 21 Apr 1983
Agate (quartz)
Armenia : Scott 586 : 250 dram : 1998
Agate (quartz)
Australia : Scott 558 : 6 cents : 11 Jul 1973
Chrysoprase (quartz - chalcedony)
Australia : Scott 559 : 7 cents : 11 Jul 1973
Agate (quartz)
Australia : Scott 560 : 8 cents : 11 Jul 1973
Precious opal (quartz)
Australia : Scott 580 : 9 cents : 16 Oct 1974
[o/p Australia Scott 560]
Precious opal (quartz)
Australia : Scott 1429 : $1.20 : 5 Apr 1995
Light opal (quartz)
[holographic]
Australia : Scott 1430 : $2.50 : 5 Apr 1995
Black opal (quartz)
[holographic]
Austria : Scott B356 : 7+3 schilling : 25 May 1990
Amethyst (quartz)
Azerbaijan : Scott 422 : 20 manat : 15 Jun 1994
Amethyst (quartz)
Brazil : Scott 2199 : 1.50 new cruzado : 12 Jul 1989
Amethyst (quartz)
Bulgaria : Scott 3896 : 1 lev : 20 Nov 1995
Agate (quartz) geode
Bulgaria : Scott 3899 : 7 leva : 20 Nov 1995
Amethyst (quartz)
Burkina Faso : Scott 904 : 20 CFA francs : 4 Feb 1991
Quartz
Canada : Scott 401p : 1 cent : 4 Feb 1963
Quartz
Central Africa : Scott 1262b : 600 francs : 1998
Opal (quartz)
Comoro Islands : Scott 933 : 1125 francs : 1998
Rutile in Quartz; Calcite; Wulfenite
Cyprus : Scott 913 : 10 cents : 9 Mar 1998
Jasper (quartz)
Cyprus : Scott 916 : 30 cents : 9 Mar 1998
Chalcedony (quartz)
Czechoslovakia : Scott 1561 : 80 halura : 8 Aug 1968
Agate (quartz)
Ecuador : Scott 1441 : 400 sucre : 6 Oct 1997
Quartz (rock crystal)
France : Scott 2018 : 3 francs : 13 Sep 1986
Quartz
French Southern and Antarctic Territories : Scott 222 : 1.00 franc : 1 Jan 1997
Amethyst (quartz)
French Southern and Antarctic Territories : Scott 235 : 1.00 franc : 2 Jan 1998
Quartz (rock crystal)
Germany, DDR : Scott 1357 : 25 pfennige : 22 Feb 1972
Amethyst (quartz)
Germany, DDR : Scott 1604 : 10 pfennige : 17 Dec 1974
Banded jasper (quartz)
Germany, DDR : Scott 1605 : 15 pfennige : 17 Dec 1974
Smoky quartz
Germany, DDR : Scott 1607 : 25 pfennige : 17 Dec 1974
Amethyst (quartz)
Germany, DDR : Scott 1609 : 70 pfennige : 17 Dec 1974
Agate (quartz) geode
Germany, DDR : Scott 1960 : 25 pfennige : 24 Oct 1978
Agate (quartz)
Kenya : Scott 103 : 70 cents : 13 Dec 1977
Agate (quartz; petrified wood)
Kenya : Scott 105 : 1 shilling : 13 Dec 1977
Amethyst (quartz)
Kenya : Scott 106 : 1.50 shilling : 13 Dec 1977
Agate (quartz) geode
Korea, DPR : Stanley Gibbons N3513 : 20 chon : 2 May 1995
Amethyst (quartz)
Malawi : Scott 370 : 5 tambala : 20 Aug 1980
Agate (quartz)
Malawi : Scott 372 : 20 tambala : 20 Aug 1980
Smoky quartz
Monaco : Scott 1728 : 6.00 franc : 4 Sep 1990
Quartz
New Zealand : Scott 756 : 2 cent : 1 Dec 1982
Agate (quartz)
New Zealand : Scott 758 : 4 cent : 1 Dec 1982
Amethyst (quartz)
New Zealand : Scott 759 : 5 cent : 1 Dec 1982
Carnelian (quartz)
Russia : Scott 2825 : 4 kopecks : 26 Dec 1963
Jasper (quartz)
Russia : Scott 2826 : 6 kopecks : 26 Dec 1963
Amethyst (quartz)
Switzerland : Scott B276 : 40+10 centimes : 31 May 1958
Quartz (rock crystal)
Switzerland : Scott B283 : 10+10 centimes : 1 Jun 1959
Agate (quartz)
Switzerland : Scott B285 : 30+10 centimes : 1 Jun 1959
Amethyst (quartz)
Switzerland : Scott B292 : 5+5 centimes : 1 Jun 1960
Smoky quartz
Thailand : Scott 624 : 75 stang : 7 Jun 1972
Ruby (corundum); quartz
Thailand : Scott 625 : 2 baht : 7 Jun 1972
Sapphire (corundum); quartz
Thailand : Scott 626 : 4 baht : 7 Jun 1972
Zircon; quartz
Uruguay : Scott 828 : 5 pesos : 7 Oct 1972
Amethyst (quartz)
Uruguay : Scott 829 : 5 pesos : 7 Oct 1972
Agate (quartz)
Uruguay : Scott 830 : 5 pesos : 7 Oct 1972
Chalcedony (quartz)
United States : Scott 1538 : 10 cents : 13 Jun 1974
Agate (quartz; petrified wood)
United States : Scott 1539 : 10 cents : 13 Jun 1974
Tourmaline; Quartz
United States : Scott 1540 : 10 cents : 13 Jun 1974
Amethyst (quartz)
Zaire : Scott 1103 : 45 makuta : 13 Feb 1983
Quartz
Zimbabwe : Scott 502 : 17 cents : 21 Aug 1985
Amethyst (quartz) geode