1.  quartz(n = noun.substance) crystal, lechatelierite, quartz glass, vitreous silica - colorless glass made of almost pure silica; Array
is a kind of natural glass

2.  quartz(n = noun.substance) Array - a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities; Array
is a kind of mineral
has particulars: quartz crystal, rock crystal, transparent quartz, cairngorm, smoky quartz, amethyst, calcedony, chalcedony, citrine, rose quartz, aventurine, sunstone, common topaz, false topaz, topaz

   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. [1913 Webster]
" The crystalline varieties include: amethyst, violet; citrine and false topaz, pale yellow; rock crystal, transparent and colorless or nearly so; rose quartz, rosecolored; smoky quartz, smoky brown. The chief crypto-crystalline varieties are: agate, a chalcedony in layers or clouded with different colors, including the onyx and sardonyx; carnelian and sard, red or flesh-colored chalcedony; chalcedony, nearly white, and waxy in luster; chrysoprase, an apple-green chalcedony; flint, hornstone, basanite, or touchstone, brown to black in color and compact in texture; heliotrope, green dotted with red; jasper, opaque, red yellow, or brown, colored by iron or ferruginous clay; prase, translucent and dull leek-green. Quartz is an essential constituent of granite, and abounds in rocks of all ages. It forms the rocks quartzite (quartz rock) and sandstone, and makes most of the sand of the seashore." [1913 Webster]

quartz, n. a mineral form of silica that crystallizes as hexagonal prisms.

Idiom:
quartz clock a clock operated by vibrations of an electrically driven quartz crystal. quartz lamp a quartz tube containing mercury vapour and used as a light source.

Etymology:
G Quarz f. WSlav. kwardy

N  hardness, rigidity, renitence, renitency, inflexibility, temper, callosity, durity, induration, petrifaction, lapidification, lapidescence, vitrification, ossification, crystallization, stone, pebble, flint, marble, rock, fossil, crag, crystal, quartz, granite, adamant, bone, cartilage, hardware, heart of oak, block, board, deal board, iron, steel, cast iron, decarbonized iron, wrought iron, nail, brick, concrete, cement, hard, rigid, stubborn, stiff, firm, starch, starched, stark, unbending, unlimber, unyielding, inflexible, tense, indurate, indurated, gritty, proof, adamant, adamantine, adamantean, concrete, stony, granitic, calculous, lithic, vitreous, horny, corneous, bony, osseous, ossific, cartilaginous, hard as a rock, stiff as buckram, stiff as a poker, stiff as starch, stiff as as board.

quartz battery, quartz crystal, quartz glass, quartz lamp, quartz mill, quartz oscillator, rose quartz, smoky quartz, transparent quartz, vein quartz