Aventurine is most often green but may also be other colors such Mica, Hematite, or Goethite scales which cause a glisteningĮffect. Opaque, compact Quartz / Chalcedony containing small (See the Ametrine gemstone page for more details.) A rare multicolored variety of Quartz with purple and yellow highlights, essentially a combination of Amethyst and Citrine in a single stone. (See the Amethyst gemstone page for more details.) Tumbled Amethyst with white Milky Quartz is sometimes known as Amethyst Quartz. Purple variety of Quartz, and its most popular and valuable gemstone variety. Varieties specific to Amethyst, Citrine, Smoky Quartz, Rose Quartz, Rutilated Quartz, and Chalcedony are listed separately. Cat's Eye Quartz is usually grayish in color and translucent. It is not common, and the chatoyant effect is usually weak. Blue Quartz may also refer to a dull grayish-blue Quartz in massive form with Crocidolite inclusions.Ĭolorless Quartz with Tourmaline inclusions, often as thin long black crystals, is known as "Tourmalinated Quartz".Ĭat's Eye Quartz is Quartz with dense, tiny Rutile inclusions that cause a cat's eye effect.
Most "Blue Quartz" is clear Rock Crystal irradiated with gold to from a deep sky blue color. The blue variety of Quartz, which is uncommon in nature, is seldom used as a gemstone. May also be called "Green Amethyst" by some jewelers. Prasiolite, or Green Quartz, describes a light green Quartz artificially colored by heat treatment of certain types of Amethyst. See the Ametrine gemstone page for more details. See the Rutilated Quartz gemstone page for more details.Īmetrine is an interesting, color-zoned combination of purple Amethyst and brownish-yellow Citrine. Though very common in nature, it is not used as a gemstone.Ĭolorless Quartz with golden yellow Rutile inclusions, as hairlike growths within the gemstone, are known as Rutilated Quartz. Milky Quartz is the white, translucent to opaque variety of Quartz. Flawless and very large cuts may be cut from Rock Crystal.
LARGE PINK QUARTZ CRYSTAL FREE
The colorless, transparent variety of Quartz, free of any impurities, is known as "Rock Crystal". See the Rose Quartz gemstone page for more details. Rose Quartz is often milky or hazy, and it may lack good transparency. The rosy pink variety of Quartz is known as Rose Quartz, and its color is usually soft, ranging from very light pink to medium pink in intensity. See the Smoky Quartz gemstone page for more details.
Despite its dark color, it is rarely opaque. It ranges in color from light brown toīlack. See the Citrine gemstone page for more details.īrown "smoky" variety of Quartz. Light yellow or lemon yellow Citrine is often called Lemon Quartz in the gem trade. It is usually colored by heat treatment of Amethyst or Smoky Quartz. See the Amethyst gemstone page for more details.Ĭitrine is the yellow, orange, or reddish-brown variety of Quartz. Amethyst ranges from light to dark purple. The main crystalline Quartz varieties used as gemstones are described below.Īmethyst, the purple variety, is the most popular and valuable Quartz gemstone. Various impurities are responsible for the extensive range of colors. Pure Quartz, which is also known as Rock Crystal, is colorless. White, Colorless, Blue, Red, Green, Yellow, Orange, Brown, Pink, Purple, Gray, Black, Multicolored
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