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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 ə ˈ t ɔɪ. ən s i / shə-TOY-ən-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. Aqeeq - Wikipedia

   en.wikipedia.org/wiki/Aqeeq

   A stone is ground into shape (often a cabochon or a short, wide cylinder) and polished to a shine. Sometimes the flat surface is engraved with a religious motto in Arabic, which is sometimes inlaid with gold. The finished gem is then mounted on a ring according to the stones finished size.

5. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Tiger's eye: Fibrous gold, red-brown or bluish colored chalcedony, exhibiting chatoyancy. Prasiolite: Green: Transparent Rutilated quartz: Contains acicular (needle-like) inclusions of rutile: Dumortierite quartz: Contains large amounts of blue dumortierite crystals: Translucent Prase: Green: Translucent

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. There are over 300 types of minerals that have been used as gemstones. Such as: ... Tiger's eye ...

7. 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.