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2. Apatite - Wikipedia

   en.wikipedia.org/wiki/Apatite

   Apatite is a group of phosphate minerals, usually hydroxyapatite, fluorapatite and chlorapatite, with high concentrations of OH −, F − and Cl − ion, respectively, in the crystal. The formula of the admixture of the three most common endmembers is written as Ca 10 ( PO 4 ) 6 (OH,F,Cl) 2 , and the crystal unit cell formulae of the ...

3. List of minerals - Wikipedia

   en.wikipedia.org/wiki/List_of_minerals

   Minerals are distinguished by various chemical and physical properties. Differences in chemical composition and crystal structure distinguish the various species. Within a mineral species there may be variation in physical properties or minor amounts of impurities that are recognized by mineralogists or wider society as a mineral variety.

4. Amblygonite - Wikipedia

   en.wikipedia.org/wiki/Amblygonite

   Amblygonite (/ æ m ˈ b l ɪ ɡ ə ˌ n aɪ t /) is a fluorophosphate mineral, (Li,Na)AlPO 4 (F,OH), composed of lithium, sodium, aluminium, phosphate, fluoride and hydroxide.The mineral occurs in pegmatite deposits and is easily mistaken for albite and other feldspars.

5. Gemstone Meanings: Power and Significance of the 25 Most ...

   www.aol.com/gemstone-meanings-power-significance...

   “A vibrant and happy green gemstone, peridots are symbolically linked with the heart chakra and healing,” Salzer says. “They symbolize, good fortune, love, and playfulness.” Bjoern ...

6. Inclusion (mineral) - Wikipedia

   en.wikipedia.org/wiki/Inclusion_(mineral)

   Dark inclusions of aegerine in light-green apatite Sketch showing different shapes of inclusions In mineralogy , an inclusion is any material trapped inside a mineral during its formation. In gemology , it is an object enclosed within a gemstone or reaching its surface from the interior. [ 1 ]

7. List of minerals by optical properties - Wikipedia

   en.wikipedia.org/wiki/List_of_minerals_by...

   Optical properties of common minerals Name Crystal system Indicatrix Optical sign ... Pale green Cinnabar: Trigonal: Uniaxial (+) 0.351: None Corundum: Trigonal ...

8. List of gemstones by species - Wikipedia

   en.wikipedia.org/wiki/List_of_gemstones_by_species

   Calcite. Manganoan calcite (var.); Caledonite; Canasite; Cancrinite. Vishnevite; Carletonite; Carnallite; Cassiterite; Catapleiite; Cavansite; Celestite; Ceruleite ...

9. Fluorapatite - Wikipedia

   en.wikipedia.org/wiki/Fluorapatite

   Fluorapatite as a naturally occurring impurity in apatite generates hydrogen fluoride as a byproduct during the production of phosphoric acid, as apatite is digested by sulfuric acid. The hydrogen fluoride byproduct is now one of the industrial sources of hydrofluoric acid , which in turn is used as a starting reagent for synthesis of a range ...