![](http://www.alamy.com/thumbs/6/31573176-6FE0-4174-A2EF-8101C8A12577/2BF249M.jpg)
Tectosilicate Mineral Chalcedony. This object is part of the Education and Outreach collection, some of which are in the Q?rius science education center and available to Jan 2020
Size: 1940px × 1288px
Photo credit: © SBS Eclectic Images / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: chalcedony, mineral, tectosilicate