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2007-02-14 04:57:28 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Quartz is a highly crystalline form of silica and is piezoelectric in nature. That means a wafer of quartz will develop electricity when a pressure is applied across its faces and vice versa. Thus quartz is used as a controlling crystal in many oscillator circuits and as ultrasonic trasnducers. It is hard and is fairly stable.
2007-02-14 05:03:02 · answer #1 · answered by Swamy 7 · 0⤊ 0⤋
It's made up of silica (SiO2) tetrahedra. Quartz has a hardness of 7 on the Mohs scale. Density is 2.65 g/cm³. The typical shape is a six-sided prism that ends in six-sided pyramids, although these are often twinned, distorted, or so massive that only part of the shape is apparent from a mined specimen. Additionally a bed is a common form, particularly for varieties such as amethyst, where the crystals grow up from a matrix and thus only one termination pyramid is present. A quartz geode consists of a hollow rock (usually with an approximately spherical shape) with a core lined with a bed of crystals
2007-02-14 13:03:07 · answer #2 · answered by Art 4 · 0⤊ 0⤋
Quartz (SiO2) has a crystallline lattice structure and is planar internally. Quartz can be cut along several axes and used for several purposes. Quartz is also piezoelectric.
2007-02-14 13:07:33 · answer #3 · answered by Anonymous · 0⤊ 0⤋
It is easy to recognize and tends to be present in the same place as mineralization of Placer gold
2007-02-14 14:12:46 · answer #4 · answered by bob shark 7 · 0⤊ 0⤋
Nothing really -- it's silicon dioxide, which is one of the most common compounds on the surface of the earth.
2007-02-14 13:03:22 · answer #5 · answered by Yamson 3 · 0⤊ 0⤋
magic powers of vital earth energy stored there
2007-02-14 13:01:17 · answer #6 · answered by Nora 7 · 0⤊ 0⤋
This:
2007-02-14 13:02:52 · answer #7 · answered by Michael Dino C 4 · 0⤊ 0⤋