Defining Terms used in connection with the opal industry
CH 2
Note: There are quite a lot of differences between the Australian and American ways of spelling. I have opted in most cases to using the American, since most of my business is done in that country,. . and my word processor speaks American and keeps telling me that I've made a mistake‌so I've decided to go along with it. As I indicated before, for every suggestion made about gem cutting procedure, there will be someone who disagrees with it. If you think you've got a better suggestion, or would like to put your point of view, please take advantage of the chat program on the www.opalmine.com Internet site, or just send an e-mail to me (Peter): peter@opalmine.com I’m always open for new ideas or suggestions to pass on to the everincreasing family of Gem Cutters, the world over. Unless you understand the terms associated with the movement of light, you will not understand how various opals are identified and put into different categories or groups. Sometimes, we use terms that we think we understand but when it comes down to definitions, we really do not.
Ordinary Blokes Guide to Opal | Page 10