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  2. Asterism (gemology) - Wikipedia

    en.wikipedia.org/wiki/Asterism_(gemology)

    Asterism on the surface of a blue star sapphire. A purple-pink star sapphire displaying asterism in a platinum ring.. An asterism (from Ancient Greek ἀστήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone.

  3. Lapidary (text) - Wikipedia

    en.wikipedia.org/wiki/Lapidary_(text)

    A lapidary is a text in verse or prose, often a whole book, that describes the physical properties and metaphysical virtues of precious and semi-precious stones, that is to say, a work on gemology. [1] It was frequently used as a medical textbook, since it also includes practical information about the supposed medical application of each stone ...

  4. Sapphire - Wikipedia

    en.wikipedia.org/wiki/Sapphire

    Padparadscha sapphires are rare; the rarest of all is the totally natural variety, with no sign of artificial treatment. [12] The name is derived from the Sanskrit padma ranga (padma = lotus; ranga = color), a color akin to the lotus flower (Nelumbo nucifera). [13] Among the fancy (non-blue) sapphires, natural padparadscha fetch the highest prices.

  5. History of mineralogy - Wikipedia

    en.wikipedia.org/wiki/History_of_mineralogy

    For example, the Greek word asbestos (meaning 'inextinguishable', or 'unquenchable'), for the unusual mineral known today containing fibrous structure. [5] The ancient historians Strabo (63 BC–19 AD) and Pliny the Elder (23–79 AD) both wrote of asbestos, its qualities, and its origins, with the Hellenistic belief that it was of a type of ...

  6. Tyros (nymph) - Wikipedia

    en.wikipedia.org/wiki/Tyros_(nymph)

    In Greek mythology, Tyros (Ancient Greek: Τύρος, romanized: Túros), also romanised Tyrus, is a Phoenician nymph, the civic personification of the ancient city of Tyre, in modern Lebanon. In myth, Tyros becomes a lover of the Theban hero Heracles and is associated with the creation of tyrian purple , the rare and expensive dye Tyre was ...

  7. ‘Mysterious’ purple lump found at ancient Roman ruins was ...

    www.aol.com/news/mysterious-purple-lump-found...

    The “incredibly rare” lump was unearthed at a 1,700-year-old bathhouse in the United Kingdom. ‘Mysterious’ purple lump found at ancient Roman ruins was once ‘worth more than gold’ Skip ...

  8. Purple parchment - Wikipedia

    en.wikipedia.org/wiki/Purple_parchment

    Some just use purple parchment for sections of the work; the 8th-century Anglo-Saxon Stockholm Codex Aureus alternates dyed and un-dyed pages. It was at one point supposedly restricted for the use of Roman or Byzantine emperors, although in a letter of Saint Jerome of 384, he "writes scornfully of the wealthy Christian women whose books are ...

  9. The color purple: It's a new movie and an old hue that's rich ...

    www.aol.com/news/color-purple-movie-old-hue...

    Now, with the Christmas Day opening of the second film based on Walker's 1982 book, purple takes a seat at the box office after the historic popularity of “Barbie” and all things pink.