BirthdayAugust 4, 1950
BirthplaceFort Ord, USA

Celebrity biographies

  1. About Sapphire

    Full name: Sapphire
    Also known as: Sapphire, Tiny Cold Lesbian Mom
    Professions: Actress, Writer

  2. Sapphire Known for

    Precious (2009), Alice Walker: Beauty in Truth (2013), A Precious Ensemble (2010), From Push to Precious (2010)

  3. Sapphire Biography

    | name = Sapphire | category = oxide mineral | image = Logan Sapphire SI.jpg | imagesize = | caption = The 423-carat (85 g) blue Logan Sapphire | formula = aluminium oxide, Al2O3 | molweight = | color = often blue, but varies | habit = massive and granular | system = TrigonalSymbol (32/m)Space Group: R3c | twinning = | cleavage = | fracture = conchoidal, splintery | mohs = 9.0 | luster = vitreous | refractive = nω=1.768–1.772nε=1.760–1.763,Birefringence 0.008 | opticalprop = Abbe number 72.2 | pleochroism = strong | streak = white | gravity = 3.95–4.03 | density = | melt = 2,030–2,050 °C | fusibility = infusible | diagnostic = | solubility = Insoluble | diaphaneity = | other = coefficient of thermal expansion (5.0–6.6)×10−6/Krelative permittivity at 20 °Cε = 8.9–11.1 (anisotropic) }}Sapphire (Greek: σάπφειρος; sappheiros, 'blue stone', which probably referred instead at the time to lapis lazuli) is a gemstone variety of the mineral corundum, an aluminium oxide (α-Al2O3). Trace amounts of elements such as iron, titanium, chromium, copper, or magnesium can give corundum respectively blue, yellow, purple, orange, or green color. Chromium impurities in corundum yield pink or red tint, the latter being called ruby.Commonly, sapphires are worn in jewelry. Sapphires may be found naturally, by searching through certain sediments (due to their resistance to being eroded compared to softer stones) or rock formations. They also may be manufactured for industrial or decorative purposes in large crystal boules. Because of the remarkable hardness of sapphires—9 on the Mohs scale (the third hardest mineral, right behind diamond at 10 and moissanite at 9.25)—and of aluminium oxide in general, sapphires are used in some non-ornamental applications, including infrared optical components, such as in scientific instruments; high-durability windows; wristwatch crystals and movement bearings; and very thin electronic wafers, which are used as the insulating substrates of very special-purpose solid-state electronics (especially integrated circuits and GaN-based LEDs).

  4. Sapphire Family

  5. Sources