How to identify opal?

Category: jewelry watches gemstones

Question:
ibid

Answer:
answer: laolang
Level: Master
8 Yue 7 Ri 18:47 true or opal Identification of
www.csjj.gov.cn Changsha quality online

chrysoberyl cat s eye stone is a mineral family of one of the important variants. Hardness of 8.5 degrees, second only to diamonds and red, sapphire, its color mostly honey yellow, yellow brown, yellow, and green, green, white, coffee, color, obviously Strip golden hue, and therefore derived from its Chinese name. A good cat s eye stone, its bright-line cat s eye gem is located in the central arc, Xizhai the boundaries clear, and significantly live light. Cat s Eye because of its special light effects and therefore very valuable for more than 10 karats of high-quality opal could be worth millions of dollars. Identification of true and false way to Cat s Eye is as follows:

1. Cat s Eye The main identification feature is you can see a clear brown yellow cat s eye. Cat s Eye stone Some are silk-like rutile inclusions, and some air traffic control. Because these tubular inclusions slender and dense, so cat s eye effect is particularly evident, that…