Crystal and stones » crystallisation 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 Emerald http://www.crystalandstones.com/about-precious-stones/emerald.html http://www.crystalandstones.com/about-precious-stones/emerald.html#comments Wed, 16 Sep 2009 16:02:37 +0000 precious stones http://www.crystalandstones.com/?p=95 Considering the particular emerald which is a variety of beryl -although the name emerald in the trade is applied somewhat loosely to any stone which is of the same colour, or approaching the colour of the beryl variety -this emerald only differs chemically from the beryl, just described, in possessing an addition of oxide of [...]]]> http://www.crystalandstones.com/about-precious-stones/emerald.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