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| agate |
a type of quartz with cloudy patches or bands of color. [1/2 definitions] |
| amethyst |
a purple or violet gem of crystallized quartz, used in jewelry. [1/4 definitions] |
| bloodstone |
a semiprecious green or greenish quartz flecked with red jasper; heliotrope. |
| chalcedony |
a variety of quartz that is made of up of microscopic fibers that can come in several different colors and forms, which all have specific variety names. The colorfully banded variety of chalcedony is called agate. |
| chert |
a hard compact rock, esp. of quartz, found in limestone. |
| citrine |
a variety of quartz that is light yellow and resembles topaz. [1/2 definitions] |
| crystal |
a naturally symmetrical or layered solid, such as diamond or quartz, with a regularly repeating three-dimensional atomic, ionic, or molecular structure. [1/7 definitions] |
| crystal ball |
a globe of glass or quartz crystal used by fortune-tellers to foretell events in the future. |
| flint |
a very hard form of quartz that gives off sparks when it is struck by steel. [1/3 definitions] |
| gneiss |
a metamorphic rock made up of minerals similar to those in granite but arranged in bands that differ in color, some bands containing feldspar and quartz and others containing hornblende and mica. |
| granite |
a coarse-grained igneous rock usu. composed of silica-rich minerals such as quartz, feldspar, and small amounts of mica or amphibole, commonly used for building, sculpture, and the like. [1/2 definitions] |
| jasper |
a type of quartz that occurs in various colors and is often used for carvings. |
| morion2 |
a dark brown to blackish variety of quartz. |
| onyx |
a kind of banded multi-colored quartz, used as a semiprecious stone. [1/2 definitions] |
| quartz crystal |
in electronics, a thin plate or rod that is cut from quartz, ground, polished, and finished in such a way that it vibrates at a specific frequency. |
| quartzite |
a metamorphic rock that consists of quartz and hardened sandstone. |
| quartz lamp |
a mercury-vapor lamp, enclosed within transparent quartz, that emits ultraviolet rays when an electric current is passed through it. |
| rock crystal |
clear, esp. colorless, quartz. |
| rose quartz |
a pink or rose-colored variety of quartz, used as a gemstone. |
| sand |
loose grains of finely ground rock, often including quartz. [1/7 definitions] |
| silex |
silica, as found in flint or quartz. |
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