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2. Chiastolite - Wikipedia

   en.wikipedia.org/wiki/Chiastolite

   The chiastolite crystals have been pseudomorphically altered by a mixture of muscovite, paragonite and margarite. The calcium-rich margarite tends to form along the graphite-rich crosses or bands within the chiastolite. Mineralogically the occurrence is important because all three white mica phases are present in an equilibrium assemblage. [4]

3. Crystal healing - Wikipedia

   en.wikipedia.org/wiki/Crystal_healing

   Crystal healing is a pseudoscientific alternative-medicine practice that uses semiprecious stones and crystals such as quartz, agate, amethyst or opal. Adherents of ...

4. Ulexite - Wikipedia

   en.wikipedia.org/wiki/Ulexite

   Crystals are rare but will form fibrous, elongated crystals either oriented parallel or radial to each other. Crystals may also be acicular, resembling needles (Anthony et al., 2005). [ 16 ] The point group of ulexite is 1, which means that the crystals show very little symmetry as there are no rotational axes or mirror planes.

5. 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 ...

6. Category:Crystals - Wikipedia

   en.wikipedia.org/wiki/Category:Crystals

   Pages in category "Crystals" The following 97 pages are in this category, out of 97 total. ... Crystal healing; Crystal structure; Crystallinity; Plastic crystal;

7. Selenite (mineral) - Wikipedia

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

   Selenite, satin spar, desert rose, and gypsum flower are crystal habit varieties of the mineral gypsum.. All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate (meaning that it has two molecules of water), with the chemical formula CaSO 4 ·2H 2 O. Selenite contains no significant selenium – The similar names both derive from Greek selḗnē ...