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Large pink quartz crystal1/10/2024 ![]() ![]() Chalcedony has a waxy luster, and may be semitransparent or translucent. The term is generally only used for white or lightly colored material. VChalcedony is a cryptocrystalline quartz and moganite mixture. Similar to carnelian is sard, which is generally harder and darker. The color can vary greatly, ranging from pale orange to an intense almost-black coloration. Read about it here.Ĭarnelian Reddish orange chalcedony, translucen. Smoky quartz, a variety itself of quartz, has a few varieties of its own. It ranges in clarity from almost complete transparency to a brownish-gray crystal that is almost opaque. Smoky quartz is the brown to black, and sometimes smoky gray version of quartz. The white color is caused by minute fluid inclusions of gas, liquid, or both, trapped during crystal formation, making it of little value for optical and quality gemstone applicationsĪmazonite, Smoky Quartz with Goethite Onegite from Colorado, USA Milky quartz is the most common variety of crystalline quartz. The cloudy white character of the crystals is what lead to the variety name, milky. Milky Quartz is any quartz crystal or cluster that is white in color and cloudy. Natural citrines are rare most commercial citrines are heat-treated amethysts or smoky quartzes. Giant Citrine faceted gem from Minas Gerais, Brazil.Ĭitrine is a variety of quartz whose color ranges from a pale yellow to brown due to ferric impurities. While otherwise inclusions often reduce the value of a crystal, rutilated quartz is valued for the quality and beauty of these inclusions. They can be distributed randomly or in bundles, which sometimes are arranged star-like, and they can be sparse or dense enough to make the quartz body nearly opaque. These inclusions mostly look golden, but they also can look silver, copper red or deep black. Rutilated quartz is a type of quartz that contains acicular (needle-like) inclusions of rutile. Novo Horizonte, Bahia, Northeast Region, Brazil Amethyst is a semiprecious stone and is the traditional birthstone for February. Photo by the purple variety of quartz and is a popular gemstone. These varieties are divided more by character than by color. ![]() Smoky quartz is the brown to gray variety.Ĭryptocrystalline (crystals too small to be seen even by a microscope) varieties are also used as semi-precious stones and for ornamental purposes.Rose quartz is a pink to reddish pink variety.Prasiolite is a leek-green gemstone variety that is rare in nature but is created by heating Amethyst from certain locations.Milky Quartz is the cloudy white variety.Citrine is a yellow to orange gemstone variety that is rare in nature but is often created by heating Amethyst. ![]() Amethyst is the purple gemstone variety.Some macrocrystalline (large crystal) varieties are well known and popular as ornamental stone and as gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Europe and the Middle East. There are many different varieties of quartz, several of which are semi-precious gemstones. ![]() It is also the most varied in terms of varieties, colors and forms. It frequently is the primary mineral, >98%. It is found in nearly every geological environment and is at least a component of almost every rock type. Quartz is the most common mineral on the face of the Earth. ![]()
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