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  2. Hiddenite - Wikipedia

    en.wikipedia.org/wiki/Hiddenite

    Hiddenite Hiddenite. Hiddenite is a pale-to-emerald green variety of spodumene that is sometimes used as a gemstone. The first specimens of the hiddenite variety of spodumene were recovered circa 1879 near the settlement of White Plains, west of Stony Point, Alexander County, North Carolina. According to contemporary accounts, a man named ...

  3. Spodumene - Wikipedia

    en.wikipedia.org/wiki/Spodumene

    Spodumene is a pyroxene mineral consisting of lithium aluminium inosilicate, Li Al(Si O 3) 2, and is a commercially important source of lithium.It occurs as colorless to yellowish, purplish, or lilac kunzite (see below), yellowish-green or emerald-green hiddenite, prismatic crystals, often of great size.

  4. Hiddenite Gem Mines - Wikipedia

    en.wikipedia.org/wiki/Hiddenite_Gem_Mines

    This a public gem mine located in the Piedmont of North Carolina in Alexander County, specifically in the town of Hiddenite. [2] At the mine, more than 63 different types of gems and minerals can be found including emeralds, amethyst, sapphire, aquamarine, topaz, garnet, as well as the stone Hiddenite, which is a stone only found in this local ...

  5. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Eilat stone; Epidosite; Glimmerite; Goldstone (glittering glass) Tiger's eye; Helenite (artificial glass made from volcanic ash) Iddingsite; Kimberlite; Lamproite; Lapis lazuli; Libyan desert glass; Llanite; Maw sit sit; Moldavite; Obsidian; Apache tears; Pallasite; Peridotite (also known as olivinite) Siilinjärvi carbonatite; Soapstone (also ...

  6. Tumble finishing - Wikipedia

    en.wikipedia.org/wiki/Tumble_finishing

    A well-chosen speed for stone polishing causes the rocks within the barrel to slide past each other, with the abrasive grit between them. The result of this depends on the coarseness of the abrasive, and the duration of the tumble. Typically, a full tumble polish from rough rock to polish takes 3–5 weeks, and is done in a minimum of 3 steps.

  7. Harling (wall finish) - Wikipedia

    en.wikipedia.org/wiki/Harling_(wall_finish)

    Harling is a rough-cast wall finish consisting of lime and aggregate, known for its rough texture. [1] Many castles and other buildings in Scotland and Ulster have walls finished with harling. It is also used on contemporary buildings, where it protects against the wet Scottish and Ulster climates and eliminates the need for paint.

  8. Hiddenite, North Carolina - Wikipedia

    en.wikipedia.org/wiki/Hiddenite,_North_Carolina

    The town of Hiddenite was incorporated in 1913, but its charter was repealed in 1919. Hiddenite was named for William Earl Hidden (1853–1918), a mineralogist sent to North Carolina by Thomas Edison to look for platinum. Hidden discovered the gem that came to be known as "hiddenite" in 1879 in mines nearby.

  9. Roughcast - Wikipedia

    en.wikipedia.org/wiki/Roughcast

    Pebbledash Pebbledashing Rock dash stucco. Roughcast or pebbledash is a coarse plaster surface used on outside walls that consists of lime and sometimes cement mixed with sand, small gravel and often pebbles or shells. [1]