green feldspar

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• feldspar — /feld spahr , fel /, n. any of a group of minerals, principally aluminosilicates of potassium, sodium, and calcium, characterized by two cleavages at nearly right angles: one of the most important constituents of igneous rocks. Also, felspar.… …   Universalium

• Green — This article is about the color. For other uses, see Green (disambiguation). Green …   Wikipedia

• Amazonite — (sometimes called Amazon stone ) is a green variety of microcline feldspar.The name is taken from that of the Amazon River, from which certain green stones were formerly obtained, but it is doubtful whether green feldspar occurs in the Amazon… …   Wikipedia

• bead — beadlike, adj. /beed/, n. 1. a small, usually round object of glass, wood, stone, or the like with a hole through it, often strung with others of its kind in necklaces, rosaries, etc. 2. beads, a. a necklace of beads: You don t have your beads on …   Universalium

• Tay Thye Sun — Mr Tay Thye Sun is the founder of Far East Gemological Lab and Far East Gemological Institute. Tay Thye Sun has been practicing gemology after he graduated from the * [http://www.gia.edu Gemological Institute of America] since 1980. Before he… …   Wikipedia

• amazonite — /am euh zeuh nuyt /, n. Mineral. a green feldspar, a variety of microcline, used as an ornamental material. Also called Amazon stone. [1595 1605; AMAZON (river) + ITE1] * * * …   Universalium

• amazonite — am•a•zon•ite [[t]ˈæm ə zəˌnaɪt[/t]] n. mir a green feldspar, a variety of microcline, used as an ornamental material. Also called Am′azon stone • Etymology: 1595–1605; Amazon (river) + ite I …   From formal English to slang

• sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium

• Geology of the Australian Capital Territory — Australia grew around three fused pieces of very ancient continental crust (cratons). The geology of the Australian Capital Territory includes rocks dating from the Ordovician around 480 million years ago, whilst most rocks are from the Silurian …   Wikipedia

• Scapolite — (Gr. asairos , rod, stone), is a group of rock forming silicate minerals composed of aluminium, calcium and sodium silicate with chlorine, carbonate and sulfate. The variations in composition of the different members of the group may be expressed …   Wikipedia

• metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… …   Universalium