Cancrinite tutorial Optical mineralogy
Channel: Matt Kohn
Date: 03/05/2021

Two videos of cancrinite (a rare feldspathoid) in thin section, showing typical textures and optical characteristics. Supported by Boise State University and the US National Science Foundation.
Key characteristics: Low relief, occurrence in highly alkalic rocks, bright interference colors.
00:00​ Typical grain; compare with sodalite and K-feldspar
00:31​ Another grain from the same rock