Crystal and stones » light-beam 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 Pleochroism and colour of minerals http://www.crystalandstones.com/physical-properties/colour.html http://www.crystalandstones.com/physical-properties/colour.html#comments Wed, 16 Sep 2009 13:13:11 +0000 precious stones http://www.crystalandstones.com/?p=17 Color is one of the most wonderful effects in nature. It is an attribute of light and is not a part of the object which appears to be coloured; though all objects, by their chemical or physical composition, determine the number and variety of vibrations passed on or returned to the eye, thus fixing their [...]]]> http://www.crystalandstones.com/physical-properties/colour.html/feed 0 Light and diaphaneity http://www.crystalandstones.com/physical-properties/light.html http://www.crystalandstones.com/physical-properties/light.html#comments Wed, 16 Sep 2009 13:04:33 +0000 precious stones http://www.crystalandstones.com/?p=15 Probably the most important of the many important physical properties possessed by precious stones are those of light and its effects, for to these all known gems owe their beauty, if not actual fascination.

When light strikes a cut or polished stone, one or more of the following effects are observed:–it may be transmitted through [...]]]> http://www.crystalandstones.com/physical-properties/light.html/feed 0