Gem, Rock, and Mineral Postage Stamps Featuring
Agate


Mineral Name: Agate (a variety of quartz)

Composition: Silicon oxide

Nomenclature: Derived from the name of the Achates River, now the Dirillo River, in southwestern Sicily where it was found.

Industrial Uses: Gemstones, carvings, and ornamental stones. At one time, some childrens' toy marbles were made of agate and were called "aggies" in reference to their composition.

Additional Notes: Agate is a variety of chalcedony that often displays bands of varying color and transparency. Chalcedony is a cryptocrystalline (crystals of sub-microscopic size) variety of quartz with a somewhat waxy appearance.



Algeria : Scott 712 : 1.20 dinar : 21 Apr 1983

Agate (quartz)



Armenia : Scott 586 : 250 dram : 1998

Agate (quartz)



Australia : Scott 559 : 7 cents : 11 Jul 1973

Agate (quartz)



Bulgaria : Scott 3896 : 1 lev : 20 Nov 1995

Agate (quartz) geode



Czechoslovakia : Scott 1561 : 80 halura : 8 Aug 1968

Agate (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 106 : 1.50 shilling : 13 Dec 1977

Agate (quartz) geode



Malawi : Scott 370 : 5 tambala : 20 Aug 1980

Agate (quartz)



New Zealand : Scott 756 : 2 cent : 1 Dec 1982

Agate (quartz)



Switzerland : Scott B283 : 10+10 centimes : 1 Jun 1959

Agate (quartz)



Uruguay : Scott 829 : 5 pesos : 7 Oct 1972

Agate (quartz)



United States : Scott 1538 : 10 cents : 13 Jun 1974

Agate (quartz; petrified wood)