Dims: 1.6 x 0.4 x 0.3" (4.1 x 1.0 x 0.8 cm)
Wt: 14.0 g w/ base
Barro Preto, Minas Gerais, Brazil
A single Kyanite crystal makes up this small thumbnail specimen. I cannot be sure, but it appears to be twinned, showing a shallow notch that runs its length. The crystal is in very good condition, showing no fresh damage, and shows moderately good triclinic form, as the crystal grew closely against another and was later separated. A few of its edges are still well-defined, though, and some of its faces are still clean, but possess a very dull pearly-to-waxy luster. Its color is its most unusual aspect, for it appears to have an almost olive-green coloration that is likely caused by iron oxide inclusions. Close examination reveals that an uneven streak of pale blue coloration runs lengthwise through the center of the crystal, which is dimly transparent. There is no host rock present, and it is hot-glued onto a square, flat acrylic base.