For Quartz we have terms and definitions in 8 topics. The topics are Cinematography, Costume Jewelry, Drugs, Film Production, Geologic, Physical Geography, Telescope and Watches.

Quartz (Cinematography)

Tungsten-Halogen lights or lighting units. The name is derived from the material which encloses the lighting element. (Lighting)

Quartz (Costume Jewelry)

The name is derived from a Slavic word meaning hard and applies to a family of semiprecious stones that are characterized by translucence. Crystal quartz, rose quartz, amethyst, aventurine, and cat?s-eye are part of this family.

Quartz (Drugs)

Smokable methamphetamine

Quartz (Film Production)

Tungsten-Halogen lights or lighting units. The name is derived from the material which encloses the lighting element. (Lighting)

Quartz (Geologic)

One of the most common minerals in the Earth’s crust (and in some new-age boutiques). Made up of silicon dioxide (SiO2),lso called silica. Commonly in white masses. Crystals are clear, glassy 6-sided prisms.

Quartz (Physical Geography)

Mineral with the chemical formula SiO2. Quartz is common in continental crust but rare in oceanic crust.

Quartz (Telescope)

In telescope optics, quartz generally does not refer to the crystalline material found in nature, but to a glassy substance, fused quartz, formed by melting down lots of quartz crystals (e.g., very pure sand) in an oven. Quartz has thermal properties that make it valuable for lenses and mirrors alike, and optical properties that are of particular use in certain kinds of systems, even those which don't need its thermal properties. In particular, very fine achromats can be made from quartz and fluorite.

Quartz (Watches)

Used to describe a watch powered by an oscillating quartz crystal which draws its power from a small battery. Oscillating 32,768 times per second, an electronic circuit divides this oscillation into precise increments of 1 second or less. Used in both digital and analogue watches. Whilst derided by many purists as disposable and of little soul, the quartz watch is nonetheless extremely accurate. Watches have been made super-accurate by using a much higher frequency (e.g. 4.2 million cycles per second) or by using two oscillators and by using temperature compensation.

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