This site saves small pieces of text information (cookies) on your device for
some key features sich as remembering search results. By browsing this website
you grant us permission to store that information on your device.
We also use other cookies to analyse traffic to this site. You can choose to
allow or disallow this.
If you do not choose whether or not you allow analytics no cookies will work
and the site will not function correctly.
Reflected light optical micrograph of a polished cross-section of a synthetic standard of cerium(IV) oxide [CeO2] in 'P-0114 CeO2' (CSIRO), ex Charles M. Taylor Co. Instrument: Olympus BX-51. Crossed polarisers.
Micrograph by Aaron Torpy. (C) 2024 CSIRO Mineral Resources. All Rights reserved.
Chalcedony specimen from El Paso, Texas. Size: 2 x 1.25" (5.5 cm x 3 cm). It contains trace amounts of the uranyl ion (uranium) which makes it fluoresce under short wave ultraviolet light.