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  2. Mineral jig - Wikipedia

    en.wikipedia.org/wiki/Mineral_jig

    In metallurgy, mineral jigs are a type of gravity concentrator, separating materials with different densities. It is widely used in recovering valuable heavy minerals such as gold , platinum , tin , tungsten , as well as gemstones such as diamond and sapphire, from alluvial or placer deposits .

  3. Chrysoberyl - Wikipedia

    en.wikipedia.org/wiki/Chrysoberyl

    An alexandrite cat's eye is a chrysoberyl cat's eye that changes color. "Milk and honey" is a term commonly used to describe the color of the best cat's eyes. The effect refers to the sharp milky ray of white light normally crossing the cabochon as a center line along its length and overlying the honey-colored background.

  4. Pietersite - Wikipedia

    en.wikipedia.org/wiki/Pietersite

    Polished pietersite. Pietersite is a commercial term for a variety of the mineral chalcedony.Originating from Namibia and China, where it is mined for use as a decorative stone due to its chaotic chatoyancy and brecciated structure.

  5. Orbicular jasper - Wikipedia

    en.wikipedia.org/wiki/Orbicular_jasper

    Orbicular jasper from Madagascar. Orbicular jasper is a variety of jasper which contains variably-colored orbs or spherical inclusions or zones. In highly silicified rhyolite or tuff, quartz and feldspar crystallize in radial aggregates of needle-like crystals which provide the basis or seed for the orbicular structure seen in this kind of jasper. [1]

  6. The best skin care routine for your 50s, according to ... - AOL

    www.aol.com/lifestyle/best-skin-care-routine-for...

    RoC Retinol Correxion Under Eye Cream includes retinol, niacinamide, B5 and peptides for plumping the skin, filling out fine lines and wrinkles and for brightening those dark under-eye areas. $21 ...

  7. Chatoyancy - Wikipedia

    en.wikipedia.org/wiki/Chatoyancy

    Tiger's eye Tiger's eye. In gemology, chatoyancy (/ ʃ É™ ˈ t ɔɪ. É™n s i / shÉ™-TOY-É™n-see), also called chatoyance or the cat's eye effect, [1] is an optical reflectance effect seen in certain gemstones, woods, and carbon fiber. Coined from the French œil de chat, meaning 'cat's eye'. The chatoyant effect is typically characterized by ...

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