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Specimen dimensions: 4 x 1¾ x 1½ inches (105x44x40mm)
Specimen weight: 15½ ounces (440 grams)
Collection: Highland Campus
For reference: the U.S. penny is 0.75 inches [19.05 mm] in diameter.
Distinguishing Properties (click this to reveal) - make your list of observations before peeking
Distinguishing Properties (click this to reveal) - make your list of observations before peeking
Distinguishing Physical Properties:
Dark (black) color, possibly greenish tinge.
2 sides, look like it's close to a 90 degree angle. It's a rough sample, but if you look closely, there seem to be "steps" on the visible surfaces, reflecting the 2 planes of cleavage.
This sample easily scratches glass.
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