- Gems and Jewelry, 11.9 x 5.8 mm; 3.47 carats
Allanite is a member of the Epidote group and is one of the rare cut stones from this group i.e., Epidote, Clinozoisite, Zoisite, etc. Allanite is the only member of this group that contains the rare earth elements Yttrium and Lanthanum. This stone is essentially opaque, with a very very dark brown (virtually black) color and an Elongated Rectangle cut. It's a great rare gem to add to a "black stone" collection, or to fill out one of the spots in the Epidote group in your collection.