Mygemssarah's blog
Home
01/08/2010
2010-1-8 上午12:59:37
NEXT POST
Welcome to TypePad! This is a sample post you can edit or delete later.
PREVIOUS POST
Gemstone-Tiger eye
Tiger's eye (also called Tigers eye or Tiger eye) is a chatoyant gemstone that is usually a metamorphic rock that is yellow- to red-brown, with a silky luster. A member of the quartz group, it is a classic example of pseudomorphous replacement by silica of fibrous crocidolite (blue asbestos). An incompletely silicified blue variant is called Hawk's eye. The gems are usually cut en cabochon in order to best display their chatoyancy. Red stones are brought about through gentle heat treatment. Honey-coloured stones have been used to imitate the much higher valued cat's eye chrysoberyl (cymophane), but the overall effect...
Mygemssarah
1
Following
0
Followers
Search
