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itten also Æthiops.] [Obs.] Ethiops martial (Old Chem.), black oxide of iron. -- Ethiops mineral (Old Chem.), black sulphide of mercury, obtained by triturating mercury with sulphur. -- Ethiops per se (Old Chem.), mercury in finely divided state, having the appearance of a dark powder, obtained by shaking it up or by…

A metallic mineral, a selenide of copper and silver; -- so called by Berzelius on account of its being found soon after the discovery of the metal selenium.

A mineral occurring in transparent emerald green crystals. It is hydrous arseniate of copper.

A mineral of a brownish red color and vitreous luster, consisting chiefly of the silicates of iron, zirconia, and lime.

a mineral, consisting chiefly of the silicate of bismuth, found at Freiberg; -- called also culytine.

A brownish black mineral with a metallic luster, found in Norway. It contains niobium, titanium, yttrium, and uranium, with some other metals.

o intensify or concentrate; as, to exalt the juices of bodies. With chemic art exalts the mineral powers. Pope.

cause, the truth of a statement; to inquire or search into; to explore; as, to examine a mineral; to examine a ship to know whether she is seaworthy; to examine a proposition, theory, or question. Examine well your own thoughts. Chaucer. Examine their counsels and their cares. Shak.

The scaling off of a bone, a rock, or a mineral, etc.; the state of being exfoliated.

A black, greenish, or brownish mineral of the chrysolite group. It is a silicate of iron.

A small lateral lode falling into the main lode or mineral vein. Ure.

A name given to a group of minerals, closely related in crystalline form, and all silicates of alumina with either potash, soda, lime, or, in one case, baryta. They occur in crystals and crystalline masses, vitreous in luster, and breaking rather easily in two directions at right angles to each other, or nearly so. The…

A mineral of a brownish black color, essentially a tantalo- niobate of yttrium, erbium, and cerium; -- so called after Robert Ferguson.

ubes of copper separated by an insulating material composed of paper saturated with black mineral wax.

A white crystallized mineral resin from the Fichtelgebirge, Bavaria.

llust. under Brain. -- Fissure vein (Mining), a crack in the earth's surface filled with mineral matter. Raymond.

of cerium, occuring near Fahlun in Sweden. Tynosite, from Colorado, is probably the same mineral.

Calcium fluoride, a mineral of many different colors, white, yellow, purple, green, red, etc., often very beautiful, crystallizing commonly in cubes with perfect octahedral cleavage; also massive. It is used as a flux. Some varieties are used for ornamental vessels. Also called fluor spar, or simply fluor.…

Any substance or mixture used to promote the fusion of metals or minerals, as alkalies, borax, lime, fluorite.

Capable of being melted or fused, as a mineral. Holland. -- Flux"i*ble*ness, n.