spinel material

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• spinel — noun a) any of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours b) any crystalline material, not necessarily an oxide, that possesses the same crystal structure… …   Wiktionary

• ruby spinel — Mineral. a deep red, transparent variety of spinel, used as a gem. Also called spinel ruby. [1830 40] * * * ▪ mineral       natural or synthetic gem quality spinel (q.v.; magnesium aluminum oxide) that resembles ruby. The two natural gems are… …   Universalium

• Lithium-ion battery — Batteries caption=Lithium ion battery of Varta, Museum Autovision, Altlußheim, Germany EtoW=160 Wh/kg EtoS=270 Wh/l PtoW=1800 W/kg CtoDE=99.9% [Cite web | title = BatteryUniversity.com: Charging lithium ion batteries | first = Isidor | last =… …   Wikipedia

• Diamond simulant — Due to its low cost and close visual likeness to diamond, cubic zirconia has remained the most gemologically and economically important diamond simulant since 1976. The high price of gem grade diamonds, as well as significant ethical concerns of… …   Wikipedia

• Abiogenic petroleum origin — is a largely abandoned hypothesis that was proposed as an alternative to theory of biological petroleum origin. It was relatively popular in the past, but it went largely forgotten at the end of the 20th century after it failed to predict the… …   Wikipedia

• Hope Diamond — French Blue redirects here. For the color, see French blue (color). Hope Diamond Hope Diamond in the Smithsonian Museum of Natural History Weight 45.52[1][2] …   Wikipedia

• magnet — /mag nit/, n. 1. a body, as a piece of iron or steel, that possesses the property of attracting certain substances, as iron. 2. a lodestone. 3. a thing or person that attracts: The park was a magnet for pickpockets and muggers. [1400 50; late ME… …   Universalium

• Business and Industry Review — ▪ 1999 Introduction Overview        Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …   Universalium

• Mantle (geology) — For other uses, see Mantle (disambiguation). Earth cutaway from core to exosphere. The mantle is a part of a terrestrial planet or other rocky body large enough to have differentiation by density. The interior of the Earth, similar to the other… …   Wikipedia

• Ferrite (magnet) — For other uses, see Ferrite (disambiguation). A stack of ferrite magnets Ferrites are chemical compounds consisting of ceramic materials with iron(III) oxide (Fe2O3) as their principal component.[1] Many of them are magnetic materials and t …   Wikipedia

• Moho line — The Mantle is a part of an astronomical object. Earth s mantle is a 2,900 km thick rocky shell comprising approximately 70% of Earth s volume. It is predominantly solid and overlies the Earth s iron rich core, which occupies about 30% of Earth s… …   Wikipedia