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  2. Worry stone - Wikipedia

    en.wikipedia.org/wiki/Worry_stone

    Worry stones. Worry stones are smooth, polished gemstones, usually in the shape of an oval with a thumb-sized indentation, used for relaxation or anxiety relief. Worry stones are typically around 3 centimetres (1 in) in size. They are used by holding the stone between the index finger and thumb and gently moving one's thumb back and forth ...

  3. Fluorite - Wikipedia

    en.wikipedia.org/wiki/Fluorite

    Fluorite is normally colorless, but some varied forms found nearby look black, and are known as 'fetid fluorite' or antozonite. The minerals, containing small amounts of uranium and its daughter products, release radiation sufficiently energetic to induce oxidation of fluoride anions within the structure, to fluorine that becomes trapped inside ...

  4. Blue John (mineral) - Wikipedia

    en.wikipedia.org/wiki/Blue_John_(mineral)

    Recently discovered deposits in China have produced fluorite with colouring and banding similar to the classic Blue John stone. [4] One source is the Deqing Fluorite Mine, in Deqing County, Zhejiang Province, [1]: 40 the only source (other than in Derbyshire) that has an ornamental craft based upon it.

  5. Category:Gemstones - Wikipedia

    en.wikipedia.org/wiki/Category:Gemstones

    Fluorite (2 C, 7 P) G. Garnet gemstones (13 P) Gemologists (30 P) Gemology (3 C, 32 P) Gemstone mines (3 C, 7 P) Gemstones in culture (4 C, 9 P) H. ... Worry stone; X ...

  6. History of fluorine - Wikipedia

    en.wikipedia.org/wiki/History_of_fluorine

    The word "fluorine" derives from the Latin stem of the main source mineral, fluorite, which was first mentioned in 1529 by Georgius Agricola, the "father of mineralogy". He described fluorite as a flux—an additive that helps melt ores and slags during smelting. [1] [2] Fluorite stones were called schone flusse in the German of the time ...

  7. Luminous gemstones - Wikipedia

    en.wikipedia.org/wiki/Luminous_gemstones

    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 ...

  8. 4 most worrisome things for retirees on Social Security as ...

    www.aol.com/finance/4-most-worrisome-things...

    Social Security’s annual cost-of-living adjustment (COLA) helps keep retirees afloat as inflation erodes purchasing power. But this year, it’s sparking some anxiety.

  9. Barber Cup and Crawford Cup - Wikipedia

    en.wikipedia.org/wiki/Barber_Cup_and_Crawford_Cup

    Pliny the Elder wrote about exorbitant amounts of money spent for cups made of "murrine" (almost certainly fluorite). Cups made from the stone gave a strange, pleasing taste to wine drunk from them. This was probably from residual resin (perhaps myrrh) that was applied to the stones, while they were carved, to prevent shattering. [3]

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