Dims: 2.0 x 2.0 x 1.5" (5.1 x 5.1 x 3.9 cm)
Wt: 4.1 oz. (116 g)
Loch Borralan, Scotland
The nearly blue-white matrix of this large hand specimen is made up of Cancrinite, one of the less common feldspathoids. It shows no crystal form and has a white color with a gray-blue tinge and a dull luster. It acts as a matrix to at least three other minerals; biotite is one of these, though it is in the least amount. Another one is either hornblende or nepheline, and the third is a felspar or feldspathoid that I cannot identify.