Chemistry

  1. Home
  2. Education
  3. Chemistry

Agate

By , About.com Guide

See More About:

1 of 68

Gallery Index
Agate is chalcedony that displays concentric banding.

Agate is chalcedony (a cryptocrystalline quartz) that displays concentric banding. Red-banded agate is also called sard or sardonyx.

Adrian Pingstone

Chemistry

  1. Home
  2. Education
  3. Chemistry
  4. Everyday Chemistry
  5. Jewelry Chemistry
  6. Agate>

©2010 About.com, a part of The New York Times Company.

All rights reserved.