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Fluorite is allochromatic, meaning that it can be tinted with elemental impurities. Fluorite comes in a wide range of colors and has consequently been dubbed "the most colorful mineral in the world". Every color of the rainbow in various shades is represented by fluorite samples, along with white, black, and clear crystals.
Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties.High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1]
Acicular colorless scolecite crystals in a group with pale green apophyllite and very light pink stilbite Gypsum (selenite variety): Santa Eulalia District, Chihuahua, Mexico Serandite clusters from Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada Botryoidal balls of shattuckite, from Otjikotu, Kaokoveld, Kunene, Namibia Ball ...
Rhodochrosite with fluorite, tetrahedrite and quartz. Rhodochrosite from Silverton, Colorado , U.S. The Alma King is the largest known rhodochrosite crystal; it was found in the Sweet Home Mine near Alma, Colorado and donated to the Denver Museum of Nature and Science .
Some fluorite, particularly the variety chlorophane (aka pyroemerald and cobra stone), may become very faintly luminescent simply from the heat of one's hand. Chlorophane is unusual for combining the properties of thermoluminescence, triboluminescence, phosphorescence, and fluorescence; it will emit visible spectrum light when rubbed, or ...
Crystals may be green at one end and pink at the other, or green on the outside and pink inside; this type is called watermelon tourmaline and is prized in jewelry. An excellent example of watermelon tourmaline jewelry is a brooch piece (1969, gold, watermelon tourmaline, diamonds) by Andrew Grima (British, b.
Well known for its blue color, sodalite may also be grey, yellow, green, or pink and is often mottled with white veins or patches. The more uniformly blue material is used in jewellery, where it is fashioned into cabochons and beads. Lesser material is more often seen as facing or inlay in various applications.
Antozonite with calcite from the Margnac Mine, Compreignac, Haute-Vienne, Limousin, France - (6x5.5cm) Fluorite (antozonite) from Wölsendorf, Oberpfalz, Southern Germany Antozonite (historically known as Stinkspat , Stinkfluss , Stinkstein , Stinkspar [ 1 ] and fetid fluorite [ 2 ] ) is a radioactive fluorite variety first found in Wölsendorf ...