carbuncle

carbuncle, in mineralogy, a deep red, cabochon-cut almandine, which is an iron aluminum garnet. See almandine.

This article was most recently revised and updated by John P. Rafferty.
Citation Information
Article Title: carbuncle
Website Name: Encyclopaedia Britannica
Publisher: Encyclopaedia Britannica, Inc.
Date Published: 08 December 2006
URL: https://www.britannica.comhttps://www.britannica.com/topic/carbuncle-gemstone
Access Date: November 24, 2024