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2. Desert rose (crystal) - Wikipedia

   en.wikipedia.org/wiki/Desert_rose_(crystal)

   A desert rose is an intricate rose -like formation of crystal clusters of gypsum or baryte, which include abundant sand grains. [1] The "petals" are crystals flattened on the c axis, fanning open in radiating clusters. The rosette crystal habit tends to occur when the crystals form in arid sandy conditions, [1] such as the evaporation of a ...

3. Sioux Quartzite - Wikipedia

   en.wikipedia.org/wiki/Sioux_quartzite

   Sioux Quartzite at Falls Park, Sioux Falls, South Dakota Cross-bedding in the Sioux Quartzite, Blue Mounds State Park, Minnesota, United States.. The Sioux Quartzite is a Proterozoic quartzite that is found in the region around the intersection of Minnesota, South Dakota, and Iowa, and correlates with other rock units throughout the upper midwestern and southwestern United States.

4. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Quartz. Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral ...

5. Rose quartz, raw minerals and amethyst geodes, oh my ... - AOL

   www.aol.com/news/rose-quartz-raw-minerals...

   Bailey Stover. August 3, 2024 at 3:00 AM. The Gem Faire returned to the Scottish Rite Masonic Center in Sacramento on Friday for its 35th year, bringing more than 75 of the country’s foremost ...

6. Herkimer diamond - Wikipedia

   en.wikipedia.org/wiki/Herkimer_diamond

   Herkimer diamonds are double-terminated quartz crystals discovered within exposed outcrops of dolomite in and around Herkimer County, New York, and the Mohawk River Valley in the US. [1][2] They are not diamonds; the "diamond" in their name is due to both their clarity and well formed faces. Because the first discovery sites were in the village ...

7. Gemstones of Pakistan - Wikipedia

   en.wikipedia.org/wiki/Gemstones_of_Pakistan

   Various types of quartz found are diamond, window, quartz on prehnite, and faden. Image shows translucent light sea-foam green prehnite with quartz crystals. [3] Taftan: Quartz and brookite: The image shows a large specimen of quartz crystals on brookite from Taftan. Chagai: Malachite, azurite, garnet, zircon, obsidian, lapis lazuli, and brookite