Zircon var. Cyrtolite, Thorite-(Fe)

Large, well-crystallized specimen of Zircon var. Cyrtolite with Thorite-(Fe) from the Butterfield Pegmatites, Pine, Jefferson County, Colorado, USA. Exceptional large specimen of these unusual REE and Th minerals from this now-closed locality. From the noted collection of physicist and engineer Dr. George Kamin of Arcadia, California. Rare!!