Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of quartz is as below...

Quartzoid :: Quartzoid (n.) A form of crystal common with quartz, consisting of two six-sided pyramids, base to base..

Crush :: Crush (v. t.) To reduce to fine particles by pounding or grinding; to comminute; as, to crush quartz..

Quartzous :: quartzous (a.) Quarzose.

Plasma :: Plasma (n.) A variety of quartz, of a color between grass green and leek green, which is found associated with common chalcedony. It was much esteemed by the ancients for making engraved ornaments..

Flint :: Flint (n.) A massive, somewhat impure variety of quartz, in color usually of a gray to brown or nearly black, breaking with a conchoidal fracture and sharp edge. It is very hard, and strikes fire with steel..

Trapezohedron :: Trapezohedron (n.) A tetartohedral solid of the hexagonal system, bounded by six trapezoidal planes. The faces of this form are common on quartz crystals..

Quartz :: Quartz (n.) A form of silica, or silicon dioxide (SiO2), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque..

Cat''s-eye :: Cat's-eye (n.) A variety of quartz or chalcedony, exhibiting opalescent reflections from within, like the eye of a cat. The name is given to other gems affording like effects, esp. the chrysoberyl..

Aventurine :: Aventurine (n.) A variety of translucent quartz, spangled throughout with scales of yellow mica..

Morion :: Morion (n.) A dark variety of smoky quartz.

Petuntze :: Petuntze (n.) Powdered fledspar, kaolin, or quartz, used in the manufacture of porcelain..

Porphyritic :: Porphyritic (a.) Relating to, or resembling, porphyry, that is, characterized by the presence of distinct crystals, as of feldspar, quartz, or augite, in a relatively fine-grained base, often aphanitic or cryptocrystalline..

Syenite :: Syenite (n.) Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called granite..

Sandstone :: Sandstone (n.) A rock made of sand more or less firmly united. Common or siliceous sandstone consists mainly of quartz sand.

Rhyolite :: Rhyolite (n.) A quartzose trachyte, an igneous rock often showing a fluidal structure..

Crystal :: Crystal (n.) The material of quartz, in crystallization transparent or nearly so, and either colorless or slightly tinged with gray, or the like; -- called also rock crystal. Ornamental vessels are made of it. Cf. Smoky quartz, Pebble; also Brazilian pebble, under Brazilian..

Citrine :: Citrine (n.) A yellow, pellucid variety of quartz..

Smalt :: Smalt (v. t.) A deep blue pigment or coloring material used in various arts. It is a vitreous substance made of cobalt, potash, and calcined quartz fused, and reduced to a powder..

Polianite :: Polianite (n.) Manganese dioxide, occurring in tetragonal crystals nearly as hard as quartz..

Chert :: Chert (n.) An impure, massive, flintlike quartz or hornstone, of a dull color..

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