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  2. Tiger's eye - Wikipedia

    en.wikipedia.org/wiki/Tiger's_eye

    Tiger's eye (also called tiger eye) is a chatoyant gemstone that is usually a metamorphic rock with a golden to red-brown colour and a silky lustre.As members of the quartz group, tiger's eye and the related blue-coloured mineral hawk's eye gain their silky, lustrous appearance from the parallel intergrowth of quartz crystals and altered amphibole fibres that have mostly turned into limonite.

  3. 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 ...

  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. Quartz - Wikipedia

    en.wikipedia.org/wiki/Quartz

    Opaque cryptocrystalline quartz, typically red to brown but often used for other colors: Opaque Milky quartz: White, may display diasterism: Translucent to opaque Smoky quartz: Light to dark gray, sometimes with a brownish hue: Translucent to opaque Tiger's eye: Fibrous gold, red-brown or bluish colored chalcedony, exhibiting chatoyancy ...

  6. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    This is a list of gemstones, organized by species and types. Minerals ... Color (beta) Automatic. Light. ... Tiger's Eye; Topaz; Tourmaline; Ulexite; Zircon; Asterism

  7. 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.

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