Quartz: The mineral Quartz information and pictures
In addition to all the practical uses, Quartz is essential to the gem trade. (See the separate Quartz gemstone page.) Many varieties are faceted as gems. Amethyst and Citrine are the most well …
Quartz: The gemstone Quartz information and pictures - The …
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Amethyst: The purple Quartz mineral Amethyst information and …
Detailed properties and locality information guide about the purple quartz mineral amethyst. Minerals.net Complete Information Guide to Rocks, Minerals, & Gemstones
The Gemstone Rose Quartz - The Mineral and Gemstone Kingdom
Rose Quartz is a very affordable gemstone. Due to its often hazy color and frequent flaws, it is more often tumbled or used as beads over faceting into gemstone cuts. A deeper pink color in …
Schorl tourmaline: The mineral Schorl information and pictures
Crystals may be curved or warped, and in some cases may have their growth interrupted by host rock with the same crystal appearing in two parts of a matrix. Crystal size can range from very …
Polymorphs of Quartz - The Mineral and Gemstone Kingdom
Thus, all Quartz specimens are alpha Quartz. However, when beta Quartz forms at hight temperatures and then cools down, it transforms to alpha Quartz but preserves the original …
Chalcedony quartz: The mineral Chalcedony information and …
Chalcedony is not scientifically its own mineral species, but rather a form of Quartz in microcrystalline form. . However, the name is an old name, and almost all mineral reference …
The Gemstone Aventurine - The Mineral and Gemstone Kingdom
The Fuschite is usually finely included within the Quartz, sometimes very heavily. For this reason, Aventurine is sometimes classified as a rock since it is technically a combination of two …
Citrine: The quartz mineral Citrine information and pictures
Citrine is the yellow to brownish-red variety of the mineral Quartz. It is a widely used as a gemstone, and after Amethyst it is the most popular Quartz gem. Most Citrine is formed by …
Citrine quartz: The yellow gemstone Citrine information and pictures
Citrine is the yellow to orange variety of Quartz. Natural Citrine is not common; most Citrine on the gem market is produced by heat treating Amethyst and Smoky Quartz. It takes a relatively low …