Crystal and stones » fluorine 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 Origin of precious stones http://www.crystalandstones.com/definition-precious-stones/the-origin-of-precious-stones.html http://www.crystalandstones.com/definition-precious-stones/the-origin-of-precious-stones.html#comments Wed, 16 Sep 2009 12:45:01 +0000 precious stones http://www.crystalandstones.com/?p=9 Though the origin, formation, composition, characteristics and tests of each stone will be examined in detail when dealing with the stones seriatim, it is necessary to enquire into those particulars of origin which are common to all, in order thoroughly to understand why they differ from other non-metallic and metallic minerals.

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