Crystal Fragments Of Baotite
Sheep Creek, Ravalli County, Montana, USA
Thumbnail, 1.5 x 1.0 x 0.75 cm
Ex. Rock Currier
Two very nice, vitreous, vertically striated, blackish brown crystal fragments; one 7 mm and the other 11 mm in maximum dimension. This is an excellent example of this rare barium-titanium-niobium cyclosilicate. The label, from A. L. McGuiness, indicates aeschynite(?) in association.