![]() ![]() 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. Quartz with Rutile inclusions from Novo Horizonte, Bahia, Northeast Region, Brazil Copyright © Rob Lavinsky Amethyst is a semiprecious stone and is the traditional birthstone for February. These varieties are divided more by character than by color.Īmethyst Photo by the purple variety of quartz and is a popular gemstone. 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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