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  2. Forearc - Wikipedia

    en.wikipedia.org/wiki/Forearc

    The constant circulation of material in the forearc region (accretionary prism, forearc basin and trench) generates a mixture of igneous, metamorphic and sedimentary sequences. In general, there is an increase in metamorphic grade from trench to arc where highest grade (blueschist to eclogite) is structurally uplifted (in the prisms) compared ...

  3. Early American molded glass - Wikipedia

    en.wikipedia.org/wiki/Early_American_molded_glass

    Early American molded glass refers to glass functional and decorative objects, such as bottles and dishware, that were manufactured in the United States in the 19th century. . The objects were produced by blowing molten glass into a mold, thereby causing the glass to assume the shape and pattern design of the m

  4. Obsidian - Wikipedia

    en.wikipedia.org/wiki/Obsidian

    Obsidian can be used to make extremely sharp knives, and obsidian blades are a type of glass knife made using naturally occurring obsidian instead of manufactured glass. Obsidian is used by some surgeons for scalpel blades, although this is not approved by the US Food and Drug Administration (FDA) for use on humans. [ 59 ]

  5. Gold leaf - Wikipedia

    en.wikipedia.org/wiki/Gold_leaf

    Gold glass is gold leaf held between two pieces of glass, and was used to decorate Ancient Roman vessels, where some of the gold was scraped off to form an image, as well as tesserae gold mosaics. In Western illuminated manuscripts, gold areas are normally created by applying a glue to the page, then rubbing gold leaf onto the glue. Gold ink is ...

  6. Prism (band) - Wikipedia

    en.wikipedia.org/wiki/Prism_(band)

    Prism (styled as PRiSM) is a Canadian rock band formed in Vancouver in 1977. They were originally active from 1977 to 1984 and have been active again from 1987 to present. Their classic line-up consisted of lead singer Ron Tabak, guitarist Lindsay Mitchell, keyboardist John Hall, bassist Allen Harlow and drummer Rocket Nor

  7. Vitreous enamel - Wikipedia

    en.wikipedia.org/wiki/Vitreous_enamel

    Gothic châsse; 1185–1200; champlevé enamel over copper gilded; height: 17.7 cm (7.0 in), width: 17.4 cm (6.9 in), depth: 10.1 cm (4.0 in). Vitreous enamel, also called porcelain enamel, is a material made by fusing powdered glass to a substrate by firing, usually between 750 and 850 °C (1,380 and 1,560 °F).

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