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Diamond: Also known as Moore's Diamond. American native vine and vinifera hybrid grape created (1885) in Brighton, N.Y. by Jacob Moore by crossing the Iona vinifera-labrusca hybrid with Concord. Ripe . . . View Full Definition

Diamond Frame: Tubular frame design common until World War II and derived from the bicycle layout. The engine cases often form part of the structure. In profile it resembles a diamond shape

Diamonds: A DIAMOND is an index-based unit investment trust (UIT) that holds the 30 stocks in the Dow Jones Industrial Average (DJIA). It's similar in structure to an exchange traded fund (ETF). Inves . . . View Full Definition

Diamond Muscat: Has synonym name C96-54. Californian selection (1989) derived from the complex parentage cross A13-2 x B2-11. This cultivar provides an early season white seedless grape, ripening around the . . . View Full Definition

Kimberlite: A variety of peridotite that is found in volcanic pipes which are thought to be intrusions from the upper mantle. Many diamond deposits are found in kimberlite pipes.

Mohs Hardness Scale: A collection of minerals ranging from very soft to very hard. Use as a comparison scale during mineral identification. From softest to hardest, the ten minerals are: talc 1, gypsum 2, calcit . . . View Full Definition

Network Covalent Solid: A substance which consists of an array of atoms held together by an array of covalent bonds. A crystal of a network covalent solid is actually a single, gigantic molecule. Diamond and quartz . . . View Full Definition

Carbon: An element with atomic number 6. Carbon is a nonmetal found in all organic compounds. Carbon occurs naturally as diamond, graphite, and buckminsterfullerene.

Abrasive: Used for wearing away a surface by rubbing. Examples are powdered pumice, rottenstone, sandpaper, sandpaper, steel wool.

Mohs Scale Of Hardness: An empirical, ascending scale of mineral hardness with talc as 1, gypsum 2, calcite 3, fluorite 4, apatite 5, orthoclase 6, quartz 7, topaz 8, corundum 9, and diamond 10.