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  2. Hyalite - Wikipedia

    en.wikipedia.org/wiki/Hyalite

    Hyalite is a transparent form of opal with a glassy lustre. It may exhibit an internal play of colors if natural inclusions are present. It is also called Muller's glass, water opal, and jalite. Müller's glass is named after its discoverer, Franz-Joseph Müller von Reichenstein.

  3. Opal - Wikipedia

    en.wikipedia.org/wiki/Opal

    A Peruvian opal (also called blue opal) is a semi-opaque to opaque blue-green stone found in Peru, which is often cut to include the matrix in the more opaque stones. It does not display a play of color. Blue opal also comes from Oregon and Idaho in the Owyhee region, as well as from Nevada around the Virgin Valley. [16] Opal is also formed by ...

  4. Demantoid - Wikipedia

    en.wikipedia.org/wiki/Demantoid

    Demantoid is the green gemstone variety of the mineral andradite, a member of the garnet group of minerals. Andradite is a calcium- and iron-rich garnet. The chemical formula is Ca 3 Fe 2 (SiO 4) 3 with chromium substitution as the cause of the demantoid green color. Ferric iron is the cause of the yellow in the stone.

  5. Ammolite - Wikipedia

    en.wikipedia.org/wiki/Ammolite

    Ammolite is an opal-like organic gemstone found primarily along the eastern slopes of the Rocky Mountains of North America.It is commonly unearthed by natural erosion or through the process of various mining practices, within the perimeter of an ancient sea bed called the Western Interior Seaway. [2]

  6. Opal Property Group - Wikipedia

    en.wikipedia.org/wiki/Opal_Property_Group

    Opal 3 in Leeds, one of the company's student accommodation buildings Opal Property Group Limited, often referred to as Opal, was a company based in the United Kingdom which operates a number of large property developments in UK cities, targeted at students and private renters.

  7. Chrysoprase - Wikipedia

    en.wikipedia.org/wiki/Chrysoprase

    Its color is normally apple-green, but varies from turquoise-like cyan to deep green. The darker varieties of chrysoprase are also referred to as prase . (However, the term prase is also used to describe chlorite -included quartz, and to a certain extent is a color-descriptor, rather than a rigorously defined mineral variety.)

  8. Untypical - Wikipedia

    en.wikipedia.org/wiki/Untypical

    Website: www.tiliahomes.co.uk: Untypical (originally Kier Living, part of the Kier Group, and later Tilia Homes) is a British housebuilding company. History.

  9. Opalescence - Wikipedia

    en.wikipedia.org/wiki/Opalescence

    In contrast, common opal does not display an iridescence, but often exhibits a hazy sheen of light from within the stone – the phenomenon that gemologists strictly term as opalescence. [5] This milky sheen displayed by opal is a form of adularescence .

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