Description
Keilhauite is an Yttrium-bearing RARE Titanite variety (with for those who want to know, up to 10% Y2O3). And this is a specimen from the type locality where it was originally described in the 1840s: the Feldspar quarry Buø, Tromøysund, Arendal, Aust-Agder, Norway. It is always exciting to show a rare mineral (Keilhauite occurs in just a handful of localities) that you can actually see with the unaided eye! Several sharp, lightly deformed dark brown crystals with a resinous luster in glassy Feldspar matrix. Rare material, hard to find. Here is your chance!