Mineral composed of silicon-oxygen. Has a glassy luster and a conchoidal fracture.
crystalline silicon dioxide. Better known as crystal power.
Olivine rich. Olivine is the most common mineral on earth. Silica based it is an igneous rock that transported impurities towards the surface of the earth.. Weighs 165 lbs. per cubic foot.
Type of pure silica material which is clear and can withstand a higher melting point than standard glass. (Halogen bulbs are made with Quartz because regular glass would melt.)
Quartz (silicon dioxide,SiO2) is the most common mineral on Earth. It is found in nearly every geological environment and is at least a component of almost every rock type. It is also the most varied in terms of varieties, colors and forms. This variety comes about because of the abundance and widespread distribution of quartz.
Obsolete term for a tungsten-halogen lamp.
(der) Quarz SiO2, abundant chemical mineral, as opposed to →silica, the chemical compound. Refractory material which liquifies at 1650±75°C. Main component of many moulding materials.
consists of silicon dioxide that is typically infertile but has good drainage.
Colourless, violet, yellow, brown, pink or red mineral, composed of silicon and oxygen.
This stems from the German word for "quartz"-"Quarz." Nobody seems to know where the German word came from. Quartz is an abundant mineral. Most sand is made up of small pieces of quartz. Quartz is important in glass making and in electronics. It is also used for sanding hard surfaces.
a very hard crystalline form of slicon dioxide used in chemical apparatus and in optical and electric instrument
includes Clear Quartz, Rose Quartz, Smokey Quartz, and White Quartz; see individual listings.
An abundant mineral consisting of silicon dioxide(SiO) with a hardness of 7 on the Mohs' scale.
Silicon dioxide, one of the commonest minerals in the Earth's crust. Quartz is a common constituent of a great many rocks, including granite, sandstone, some volcanic rocks, and the metamorphic rocks that are derived from them. As well-formed, vitreous crystals, it displays hexagonal prisms topped with points shaped like hexagonal pyramids (actually two rhombohedrons). See also Amethyst Galleries.
A hexagonal crystalline material often colorless or milk-white and associated with gold "veins." See Types of Gold.
A crystal form of silica which is the principal component of sand.
(Geology) The most common rock-forming mineral. It is made up of silicon dioxide (SiO2). Quartz crystals may be glassy or opaque (milky quartz) and exist in a variety of colors including white, rose, smoky gray, and purple.
The most common of stones, used for decoration since the Classical period. When free from impurities, it is a colourless rock crystal; other forms most commonly used as gemstones since the 19thC include the amethyst in all shades of violet, the cairngorm in yellow and brown, and the yellow citrine which is often wrongly referred to as topaz. The physical properties of quartz are such that when an electric current is passed through a precision-cut piece of quartz it pulsates regularly. This is used in clocks and watches in place of mechanical escapements to regulate the driving force of an electric battery, resulting in much greater accuracy. The first quartz clock movement was invented by W. A. Morrison of the Bell Laboratories in 1929.
a commonly used ingredient in quartz-aggregate finishes. Quartz or silicon dioxide is more chemical resistant and durable than the more traditional marble dust additives.
Crystalline mineral composed of silicon dioxide (SiO2).
Crystalline silica, an important rock-forming mineral, SiO2.
colorless glass made of almost pure silica
A natural or commercially synthesized silicon dioxide rock crystal. When activated by a battery or solar power, the thin sliver of crystal very predictably vibrates at an extremely high frequency thus providing very accurate time, with a degree of accuracy that deviates no more than one minute a year.
Silica, also known as silicon dioxide (SiO2), glass and sand.
A name for fused silica or melted sand from which many high-temperature containers are fashioned in the lighting industry. Quartz looks like glass but can withstand the high temperatures needed to contain high intensity arc discharges.
single-crystal SiO2. learn more.
Crystalline mineral used for gems, typically colorless and transparent.
The generic and/or commercial name for the many glass-like products used in processing steps in the fabrication of integrated circuits (SiO2).
The basic composition of sandstone and a major component in shales, conglomerates and some igneous and metamorphic rocks.
common rock-forming mineral, composed of crystalline silica (SiO2). Quartz is usually colourless and quite hard.
SiO. The second commonest mineral in the earth's crust (after feldspar).
a common rock forming silica mineral: SiO2. Quartz is usually white, or clear and glassy (pale grey); internally it has a three -dimensional framework structure and is resistant to weathering. It is a common constituent of many igneous, metamorphic and sedimentary rocks (e.g. quartzites and sandstones).
mineral comprised of crystalline silica that is toxic when deposited in the lung, causing silicosis.
Silicon dioxide (Si02) occurring in hexagonal crystal form.
When activated by a battery or solar power, a thin sliver of crystal very predictably vibrates, providing very accurate timekeeping.
1. Crystalline silica, an important rock-forming mineral. It is, next to feldspar, the commonest mineral, occurring either in transparent hexagonal crystals (colorless, or colored by impurities) or in crystalline or cryptocrystalline masses. Quartz is the commonest gangue mineral of ore deposits, forms the major proportion of most sands, and has a widespread distribution in igneous, metamorphic, and sedimentary rocks. 2. A general term for a variety of noncrystalline or cryptocrystalline minerals having the same chemical composition as that of quartz, such as chalcedony, agate, and opal.
A common rock-forming mineral of crystalline silica (SiO2) composed of silicon-oxygen tetrahedra in a 3D network. In sedimentary rocks quartz is a common detrital mineral, it also occurs in cherts as a result of the diagenesis of amorphous, hydrated forms of silica such as opal and chalcedony.
A Watch which is powered by a battery
a mineral consisting of silicon dioxide occurring in colorless or colored hexagonal crystals or in crystalline masses Mississippi: A Site for All Seasons
colorless, transparent crystals, or "ice of the gods" were used to predict the future and protect against a variety of evils. It is found worldwide but is most common in Brazil. Rutilated quartz is popularly known as Venus-hair Stone for its dark, needlelike crystals scattered throughout.
a transparent crystalline mineral of silica that finds application in sensors due to its optical and piezoelectric characteristics
An important rock-forming mineral that is glassy, white and relatively hard; it consists of silicon and oxygen.
Common silica rich, hard mineral; variety of colors ( eg white, pink, brown); found in many rock types; common gangue mineral; often associated with gold. Mineral with the formula SiO2. Usually it is clear, or translucent white, but it can be other colors due to impurities or radiation damage. It is not scratched by a knife and breaks along irregular surfaces.
Rock crystal (silicone dioxide) that can be made to oscillate by electronic switching, maintaining its very constant frequency, in accordance with its cut.
A mineral whose composition is silicon dioxide, a crystalline form of silica.
The crystalline form of Silicon Dioxide (SiO). Quartz is the material from which a blank is made.
A very common rock-forming mineral. It consists of silicon dioxide (silica), and has a hardness of 7.
A powerful way to energize the earth element, quartz crystals are best placed in the southwest and northwest sectors. They are said to bring luck with education and to enhance wisdom and spiritual growth. Rose quartz is valued as an enhancer for romance and relationships.
A mineral found in nature as a hexagonal cross section. It is pointed at one end and has a fractured base where it broke from the rock formation in which it grew.
One of the most common materials found in the mother lode. It consists of pure silica or silicon dioxide and is formed in massive and in hexagonal crystals. Quartz may be transparent, translucent, opaque, colourless or coloured. Most of the hardrock mining done for gold comes from quartz veins.
one of the most common minerals, silicon dioxide; occurs as small crystals right up to massive rocks, occurs in a myriad variety of colours, lustres, etc..
A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.
one of the most common minerals in the Earth's crust. Made up of silicon dioxide (SiO2), also called silica. Crystals are clear, glassy 6-sided prisms.
Common rock-forming mineral consisting of silicon and oxygen.
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.
It is a term for silicon dioxide which occurs in colorless and transparent or colored hexagonal crystals or in crystalline masses. It is one of the most common mineral.
Family of gems comprised of amethyst, citrine, rose quartz, smoky quartz and others.
A common mineral composed of pure silica.
Silicon dioxide, or ' silica' in crystal form. Quartz is one of the most common minerals in the crust of the Earth. It is found in granites and other igneous rocks as well as forming most sandstones. It is a very common gangue mineral. Some colour varieties of quartz are semi-precious, for example amethyst (purple), citrine (yellow), rock crystal (colourless), cairngorm (brown) and morion (black).
Crystalline silica; a hard brittle mineral breaking with a glasslike fracture, and usually transparent to translucent, and colorless, or of a white, pink, and amethystine hue.
Common rock-forming mineral consisting of silica and oxygen.
A common, hard mineral, often with brilliant crystals, generally found in large masses or veins. The quartz in the Sierra Nevada was mined for its gold content.
a very hard mineral composed of silica found worldwide in many different tyles of rocks, including sandstone and granite - BACK
A mineral compaound of silicon and oxygen; may transparent to white-coloured.
Quartz is a crystalline mineral that come in many forms, including amethyst, aventurine, citrine, opal, rock crystal, tiger's eye, rose quartz, and many others. Rutilated quartz and tourmalinated quartz have needle-like inclusions of other minerals. This common mineral is found worldwide.
A high heat resistant glass-like material manufactured from pure silica sand.
is a common rock-forming mineral (SiO2)
is a crystalline mineral used for gems, that includes amethyst and rock crystal. It is available in a variety of colors.
A Quartz Movement is a watch with a mechanism powered by a "Quartz Crystal". The crystal vibrates when placed in a electronic field, thus powering the watch. Most affordable watches today have Quartz movements. Quartz watches are mostly battery operated.
A fibre of high-purity silicon dioxide glass, produced from mineral quartz or quartz sand. (See also ceramic fibre and Classification Table, p.401.) Note.. Although quartz is invariably crystalline, quartz fibres are not. For this reason, some authorities deprecate the use of this term, preferring 'fused silica fibres'.
A highly resilient mineral based on silica (SiO2).
one of the most common minerals, occurs in massive, granular, concretionary, stalactitic, and cryptocrystalline habits. The coloring is amazingly variable, and quartz may be gray (smokey-quartz), purple ( amethyst), pink ( rose-quartz), yellow ( citrine), green ( Prase), brown ( Cairngorm), and black, as well as being white or colorless (rock crystal). Also see chalcedony.
The formation of crystal began some 200 million years ago in veins and pockets within the earth. Long thought by ancients to be solidified water or ice, its receptive power will capture you on sight. Quartz is used by all Wiccas and Shaman and is once believed its misuse was the downfall of the legendary Atlantis. They are I believe the stones of the New Age. Crystal balls were utilized in 10th century European magic. Quartz crystals were once used in early Radio transmission technology, and are widely used to coordinate the internal operations of computer -- in fact, there is almost certainly a tiny quartz crystal regulating the computer you are using right now. A crystal garden of various coloured crystals will endow your home with peace and harmony. Rose Quartz is especially used to stimulate love and to open the heart. In the New Age we have even more insight into the powers of the mind and combined with the quartz we can call the up the peace we so all desperately seek. See also: anethyst, citrine, and geodes
The most common and widely known mineral. It includes many varieties of gemstones in a great variety of colors. Among the best known are amethyst, citrine, smoky-quartz, aventurine, agate, and tiger's-eye.
a mineral composed of silicon dioxide.
Clear crystal quartz is the most common mineral. It is composed of silicon and oxygen. It forms when silica-rich solutions occur in underground cavities and cracks. Quartz can be found in every class of rock and can be divided into two groups on the basis of appearance: crystallline and micro-crystallilne.
A very hard, glassy-looking mineral; crystallized silicon dioxide; constituent of all acidic igneous rocks and some intermediate and basic rocks; common in metamorphic rocks, as a veinstone, and as a dominant constituent of sandstone (the sand grains are quartz).
A common glassy, clear to gray rock-forming mineral composed of silica.
a crystalline silica mineral; widely found in many types of rocks.
Quartz is one of the most common gem families and can be found all around the world. Quartz comprises several different groups of gems from crystalline quartz (crystals viewable by the naked eye) and crypto-crystalline (microscopic crystals). Crystalline quartz includes amethyst, aventurine, rock crystal, blue quartz, citrine, hawk’s eye, prasiolite, quartz cat’s eye, smoky quartz, rose quartz, and tiger’s eye. Crypto-crystalline quartz is also known as chalcedony and includes agate, bloodstone, carnelian, chyrsoprase, jasper, moss agate, onyx and sard. (See Quartz Facts.) (Note: Sources listed in order of primary and secondary deposits.)
Mineral or rock crystal, hexagonal in form, used in healing, weather control, dematerialization, and protection from harmful electromagnetic energy.
A mineral that is made up of Silicon and Oxygen.
Crystalline silica; under certain conditions, pieces cut from quartz crystals can be maintained in rapid oscillation of very stable frequency. For this reason they are used in clocks, timing machines & many other applications.
The quartz movement uses the famously stable vibration frequency of quartz crystal subjected to electronic tension with the help of outside energy.
A very common mineral made of silicon dioxide which is found in any color. Varieties include: agate, amethyst, bloodstone, and a host of other gemstones.
A caliber that uses the vibrations of a tiny crystal to maintain timing accuracy. The power comes from a battery that must be replaced about every 2-3 years. In recent years, new quartz technology enables the watch to recharge itself without battery replacement. This power is generated via body motion similar to an automatic mechanical watch, or powered by light through a solar cell ( Kinetic & solar-tech).
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.
Silicon Dioxide. White, colorless and in various shades depending on other minerals that may be present. It has a hardness of 7 on the Mohs' scale.
(quartz) A hexagonal mineral composed of SiO2 and polymorphous with tridymite, cristobalite, coesite, stishovite, and keatite. There are many varieties of quartz. Amethyst is purple quartz resulting from the oxidation of Fe+3 to Fe+4 by irradiation by gamma rays. Aventurine is a quartz that includes tiny plates of mica, hemitite, or other minerals. False topaz or citrine is a yellow quartz. Rock crystal is a watery clear variety. Rose quartz is a pink variety. Rutilated quartz contains needles of rutile. Smoky quartz is a brownish variety, sometimes called cairngorm. Tigereye is crocidolite (an asbestisform mineral) replaced by quartz and iron oxide and having a chatoyant effect.
A crystalline mineral used for gems; usually colourless and transparent
a very hard mineral composed of silica and found in many different types of rocks, such as sandstone and granite. Quartzes vary according to the size and purity of their crystals. those with submicroscopic crystals are divided into fibrous varieties, or chalcedonies, and granular varieties. Crystals of pure quartz are coarse, colorless, and transparetn, and quartz in this form is called rock crystal. Impure colored varieties of quartz include flint, agate, and amethyst. [AHDOS
A timekeeping mechanism made of silicon dioxide (also called "rock crystal") which vibrates mechanically when placed in an oscillating electric field. The frequency of the oscillations depends on the manner in which the crystal is cut.
A crystalline mineral used for gems, usually colorless and transparent.
Sillica crystal that via piezoelectrics allows the production of most modern cheap, accurate watches. More information: Quartz Movements
One of the most abundant minerals in the earth's crust. Has a chemical composition of SiO2 and a hardness of seven. One of the index minerals in Moh's Hardness Scale. Occurs in sedimentary, metamorphic and igneous rocks.
It is the crystalline form of Silicon Dioxide (SiO2). Material from which a blank is made.
Quartz is a common crystalline mineral.
a silicon dioxide mineral that occurs in colorless and transparent or colored hexagonal crystals and also in crystalline masses. One of the most common minerals, the chief constituent of sandstone.
Quartz is one of the most common minerals in the Earth's continental crust. It belongs to the hexagonal rhombohedral crystal system, and is made up of silica () tetrahedra. Quartz has a hardness of 7 on the Mohs scale.