• 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

2,234 questions

3,904 answers


105,587 users

What is the top side of this agate: silica?

+2 votes

asked Jan 29, 2018 by arbayowling (590 points)

3 Answers

0 votes

Could just be chalcedony, or jasper but layered chalcedony is agate. They are all SiO2..

The markings you see on the crust could actually be agate formations under the matrix. The matrix can be abraded with a rock blanket or polishing to reveal those, however most collectors prefer natural stones. Great beauty can be exposed.

answered Jan 30, 2018 by Weasel (58,850 points)
0 votes
Maybe silica, but I am not sure
answered Feb 5, 2018 by JerBrown (290 points)
0 votes
An agate simply does not have fissures or cracks. If it breaks it chips out
answered Feb 7, 2018 by Weasel (58,850 points)