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Mesolite :: Mesolite (n.) A zeolitic mineral, grayish white or yellowish, occuring in delicate groups of crystals, also fibrous massive. It is a hydrous silicate of alumina, lime, and soda..

Earth :: Earth (n.) Any earthy-looking metallic oxide, as alumina, glucina, zirconia, yttria, and thoria..

Euclase :: Euclase (n.) A brittle gem occurring in light green, transparent crystals, affording a brilliant clinodiagonal cleavage. It is a silicate of alumina and glucina..

Ultramarine :: Ultramarine (n.) A blue pigment formerly obtained by powdering lapis lazuli, but now produced in large quantities by fusing together silica, alumina, soda, and sulphur, thus forming a glass, colored blue by the sodium polysulphides made in the fusion. Also used adjectively..

Edingtonite :: Edingtonite (n.) A grayish white zeolitic mineral, in tetragonal crystals. It is a hydrous silicate of alumina and baryta..

Turquois :: Turquois (n.) A hydrous phosphate of alumina containing a little copper; calaite. It has a blue, or bluish green, color, and usually occurs in reniform masses with a botryoidal surface..

Laumontite :: Laumontite (n.) A mineral, of a white color and vitreous luster. It is a hydrous silicate of alumina and lime. Exposed to the air, it loses water, becomes opaque, and crumbles..

Harmotome :: Harmotome (n.) A hydrous silicate of alumina and baryta, occurring usually in white cruciform crystals; cross-stone..

Aluminate :: Aluminate (n.) A compound formed from the hydrate of aluminium by the substitution of a metal for the hydrogen.

Sodalite :: Sodalite (n.) A mineral of a white to blue or gray color, occuring commonly in dodecahedrons, also massive. It is a silicate of alumina and soda with some chlorine..

Aluminous :: Aluminous (a.) Pertaining to or containing alum, or alumina; as, aluminous minerals, aluminous solution..

Topaz :: Topaz (n.) A mineral occurring in rhombic prisms, generally yellowish and pellucid, also colorless, and of greenesh, bluish, or brownish shades. It sometimes occurs massive and opaque. It is a fluosilicate of alumina, and is used as a gem..

Eosphorite :: Eosphorite (n.) A hydrous phosphate of alumina and manganese. It is generally of a rose-pink color, -- whence the name..

Alumine :: Alumine (n.) Alumina.

Websterite :: Websterite (n.) A hydrous sulphate of alumina occurring in white reniform masses.

Stilt :: Stilpnomelane (n.) A black or greenish black mineral occurring in foliated flates, also in velvety bronze-colored incrustations. It is a hydrous silicate of iron and alumina..

Lazulite :: Lazulite (n.) A mineral of a light indigo-blue color, occurring in small masses, or in monoclinic crystals; blue spar. It is a hydrous phosphate of alumina and magnesia..

Spinel :: Spinelle (n.) A mineral occuring in octahedrons of great hardness and various colors, as red, green, blue, brown, and black, the red variety being the gem spinel ruby. It consist essentially of alumina and magnesia, but commonly contains iron and sometimes also chromium..

Zunyite :: Zunyite (n.) A fluosilicate of alumina occurring in tetrahedral crystals at the Zu/i mine in Colorado.

Natrolite :: Natrolite (n.) A zeolite occuring in groups of glassy acicular crystals, and in masses which often have a radiated structure. It is a hydrous silicate of alumina and soda..

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