Crystal and stones » minerals 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 Testing precious stones http://www.crystalandstones.com/imitation-gemstones/imitations-of-precious-stones.html http://www.crystalandstones.com/imitation-gemstones/imitations-of-precious-stones.html#comments Wed, 16 Sep 2009 14:53:23 +0000 precious stones http://www.crystalandstones.com/?p=56 We now arrive at the point where it is necessary to discuss the manufacture and re-formation of precious stones, and also to consider a few of the tests which may be applied to all stones. These are given here in order to save needless repetition; the tests which are specially applicable to individual stones will [...]]]> http://www.crystalandstones.com/imitation-gemstones/imitations-of-precious-stones.html/feed 0 Magnetic and Electric Influences http://www.crystalandstones.com/physical-properties/magnetic-and-electric-influences.html http://www.crystalandstones.com/physical-properties/magnetic-and-electric-influences.html#comments Wed, 16 Sep 2009 14:35:43 +0000 precious stones http://www.crystalandstones.com/?p=51 The word “electricity” is derived from the Greek “elektron,” which was the name for amber, a mineralised resin of extinct pine-trees. It was well-known to the people of pre-historic times; later to the early Egyptians, and, at a still later date, we have recorded how Thales -the Greek philosopher, who lived about the close of [...]]]> http://www.crystalandstones.com/physical-properties/magnetic-and-electric-influences.html/feed 0 Cleavage of minerals http://www.crystalandstones.com/physical-properties/cleavage.html http://www.crystalandstones.com/physical-properties/cleavage.html#comments Wed, 16 Sep 2009 12:57:18 +0000 precious stones http://www.crystalandstones.com/?p=13 By cleavage is meant the manner in which minerals separate or split off with regularity.

The difference between a break or fracture and a “cleave,” is that the former may be anywhere throughout the substance of the broken body, with an extremely remote chance of another fracture being identical in form, whereas in the [...]]]> http://www.crystalandstones.com/physical-properties/cleavage.html/feed 0 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.

At the very commencement [...]]]> http://www.crystalandstones.com/definition-precious-stones/the-origin-of-precious-stones.html/feed 0 Precious stones http://www.crystalandstones.com/definition-precious-stones/precious-stones.html http://www.crystalandstones.com/definition-precious-stones/precious-stones.html#comments Wed, 16 Sep 2009 11:09:08 +0000 precious stones http://www.crystalandstones.com/?p=5 What constitutes a precious stone is the question which, at the onset, rises in the mind, and this question, simple as it seems, is one by no means easy to answer, since what may be considered precious at one time, may cease to be so at another.

There are, however, certain minerals which possess distinctive [...]]]> http://www.crystalandstones.com/definition-precious-stones/precious-stones.html/feed 0