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  2. Pietra dura - Wikipedia

    en.wikipedia.org/wiki/Pietra_dura

    Pietra dura (Italian: [ˈpjɛːtra ˈduːra]), pietre dure ([ˈpjɛːtre ˈduːre]) or intarsia lapidary [1] , called parchin kari or parchinkari (Persian: پرچین کاری) in the Indian subcontinent, is a term for the inlay technique of using cut and fitted, highly polished colored stones to create images.

  3. Hardstone carving - Wikipedia

    en.wikipedia.org/wiki/Hardstone_carving

    Mughal dagger hilt in jade with gold, rubies, and emeralds.. Hardstone carving, in art history and archaeology, is the artistic carving of semi-precious stones (and sometimes gemstones), such as jade, rock crystal (clear quartz), agate, onyx, jasper, serpentinite, or carnelian, and for objects made in this way.

  4. Opificio delle pietre dure - Wikipedia

    en.wikipedia.org/wiki/Opificio_delle_pietre_dure

    The Opificio delle pietre dure, literally meaning "Workshop of semi-precious stones", is a public institute of the Italian Ministry for Cultural Heritage based in Florence. It is a global leader in the field of art restoration and provides teaching as one of two Italian state conservation schools (the other being the Istituto Superiore per la ...

  5. Opus sectile - Wikipedia

    en.wikipedia.org/wiki/Opus_sectile

    Opus sectile is a form of pietra dura popularized in the ancient and medieval Roman world where materials were cut and inlaid into walls and floors to make a picture or pattern. Common materials were marble, mother of pearl, and glass. The materials were cut in thin pieces, polished, then trimmed further according to a chosen pattern.

  6. Papal tiara - Wikipedia

    en.wikipedia.org/wiki/Papal_tiara

    Under Boniface VIII (1294–1303) the hood of the regnum was lengthened and the circlet was greatly enriched with precious stones, while toward the end of his papacy a second circlet was added. The increased length had the symbolical meaning of dominion of the una sancta ecclesia over the earth, and demonstrated the meaning of the papal unam ...

  7. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or polished, is used to make jewelry or other adornments.

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