• 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

2,145 questions

3,752 answers

1,063 comments

17,747 users

how long does it take amethyst to form?

0 votes
asked Mar 22 by Leona (120 points)

1 Answer

0 votes

Leona, this is not a question I think anyone can answer. Amethyst is purple quartz. Quattz is silica which chemically is SiO2. Great pressure and temperature gradients are required. Certain proportions of iron are needed to color the amethyst and certain parameters of heat will make it darker or lighter. It can be white, purple, brown, red and almost black. I have been to the worlds largest amethyst mine where I have seen slabs that would fit in a pick-up truck bed. It is in Canada.

answered Apr 19 by Weasel (55,650 points)
 


...