• Webster's Revised Unabridged Dictionary
    • n Sternbergite (Min) A sulphide of silver and iron, occurring in soft flexible laminæ varying in color from brown to black.
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Century Dictionary and Cyclopedia
    • n sternbergite An ore of silver, a sulphid of silver and iron, having a pinchbeck-brown color and metallic luster. It occurs foliated, the laminæ being soft and flexible. It leaves a mark on paper like that of graphite.
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Webster's Revised Unabridged Dictionary
So named after Count Kaspar Sternberg, of Prague