rock crystal

listen to the pronunciation of rock crystal
الإنجليزية - التركية
kaya kristal
(isim)cef taşı
kayaç kristali
neceftaşı
necef taşı
crystal alum, rock alum
kristal şap, rock şap
الإنجليزية - الإنجليزية
clear, colourless form of the silica-based mineral quartz, often called "pure quartz" or "clear quartz"
Colorless transparent quartz, used in optical instruments and as a semiprecious gemstone. Transparent variety of the silica mineral quartz that is valued for its clarity and total lack of colour or flaws. Rock crystal formerly was used extensively as a gemstone, but it has been replaced by glass and plastic; rhinestones originally were quartz pebbles found in the Rhine River. The optical properties of rock crystal led to its use in lenses and prisms; its piezoelectric properties (see piezoelectricity) are used to control the oscillation of electrical circuits
The specimens which enclose hair-like substances are called Thetis's hair-stone, Venus's hair-stone, Venus's pencils, Cupid's net, Cupid's arrows, etc
quartz-like material resembling solid glass not used because of its rarity and high cost
The natural colorless quartz stone used to decorate metal chandeliers before glass was used The term crystal is normally only applied to the natural stone and is not appropriate to use in the description of glass
a clear quartz used in making electronic and optical equipment
rock crystal

    الواصلة

    rock Crys·tal

    التركية النطق

    räk krîstıl

    النطق

    /ˈräk ˈkrəstəl/ /ˈrɑːk ˈkrɪstəl/

    علم أصول الكلمات

    [ 'räk ] (verb.) 12th century. Middle English rokken, from Old English roccian; akin to Old High German rucken to cause to move.
المفضلات