• Register


Information for users from the old Q&A site
If you have an account from our old Q&A site, your account was transferred over, but you need to reset your password and confirm your email address.
Reset Password here
Confirm Email here

1,823 questions

3,206 answers

846 comments

9,051 users

Fire in opal

0 votes

I have an black precious opal pendant I got at a flea market. When put in the sun light a red dot appears and moves as you move the stone. The dealer said it is called fire and is rare in opals since it can be lost with certain cutting or polishing techniques. How rare is it really to have this fire in the stone?

asked Aug 16, 2013 by crotalus (120 points)

1 Answer

0 votes

This effect is called is called "Play of color" or "opalescence". You can read all about this on the opal pages on this website:

http://www.minerals.net/gemstone/opal_gemstone.aspx

http://www.minerals.net/mineral/opal.aspx

answered Aug 22, 2013 by hershel (47,740 points)
 


...