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moss agate
(Encyclopedia) moss agate: see agate.Brewer's: Agate
Ag′ate(2 syl.). So called, says Pliny (xxxvii. 10), from Achates or Gagates, a river in Sicily, near which it is found in abundance. These, these are they, if we consider well, That…mocha stone
(Encyclopedia) mocha stone: see agate.agate
(Encyclopedia) agateagateăgˈĭt [key], translucent, cryptocrystalline variety of quartz and a subvariety of chalcedony. Agates are identical in chemical structure to jasper, flint, chert, petrified…onyx
(Encyclopedia) onyxonyxŏnˈĭks [key], variety of cryptocrystalline quartz, differing from agate only in that the bands of which it is composed are parallel and regular. Its appearance is most striking…chalcedony
(Encyclopedia) chalcedonychalcedonykălsĕdˈənē [key] [from Chalcedon], form of quartz the crystals of which are so minute that its crystalline structure cannot be seen except with the aid of a…Agate Fossil Beds National Monument
(Encyclopedia) Agate Fossil Beds National Monument: see National Parks and Monuments (table)national parks and monuments (table).quartz
(Encyclopedia) quartz, one of the commonest of all rock-forming minerals and one of the most important constituents of the earth's crust. Chemically, it is silicon dioxide, SiO2. It occurs in…Scottsbluff
(Encyclopedia) ScottsbluffScottsbluffskŏtsˈblŭfˌ [key], city (1990 pop. 13,711), Scotts Bluff co., W Nebr., on the North Platte River near the Wyo. line; inc. 1900. It is the market, distribution,…Petrified Forest National Park
(Encyclopedia) Petrified Forest National Park, 93,533 acres (37,881 hectares), E Ariz.; est. as a national monument 1906, designated a national park 1962. A part of the Painted Desert, it contains…Trending
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