Heavy specimen for its size, but look at the mineralogy. Wolframite, black with crude crystals and octahedral, creamy light yellowish green crystals of Scheelite to 6mm. Matching specimen number and tag.
Scheelite
Formula
CaWO4
Crystal System
Tetragonal
Crystal Habit
Massive - Granular, Disseminated, Columnar
Cleavage
Distinct, None, None
Luster
Vitreous (Glassy)
Color
colorless, white, pale yellow, brownish yellow, reddish yellow