Metallic Luster

1
Name _______________________
3 perfect cleavages 90o, silver gray, H 2.5,
density D 7.6
Galena
Black, gray, or greenish black streak
Magnetite
Magnetic, black to dark gray H 6, D 5.2
Graphite
Steel gray, soft marks paper, H 1, D 2
Metallic Luster
Golden Yellow tarnish purple, H 3.5- 4 D 4.3
Chalcopyrite
Brass Yellow masses or cubic crystals, striated
facets on crystals common H 6 D 5, fools gold,
NO ACID
Pyrite
Red to reddish-brown streak
Black to Steel gray, red to red brown streak, H
5 6 D 5, uneven fracture
Hematite
Limonite
Yellow brown or black, H 5 - 5.5, D 3.5 - 4
Yellow-brown streak