Crystal and stones » square prismatic http://www.crystalandstones.com Properties of natural crystal precious stones, birthstones, gemstones, lithotherapy, crystal healing, chakras Sat, 28 Jan 2012 13:06:41 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Crystalline structure http://www.crystalandstones.com/physical-properties/crystalline-structure.html http://www.crystalandstones.com/physical-properties/crystalline-structure.html#comments Wed, 16 Sep 2009 12:51:15 +0000 precious stones http://www.crystalandstones.com/?p=11 Before proceeding to the study of precious stones as individual gems, certain physical properties common to all must be discussed, in order to bring the gems into separate classes, not only because of some chemical uniformity, but also because of the unity which exists between their physical formation and properties.

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