from The Century Dictionary.

  • noun 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.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Min.) A sulphide of silver and iron, occurring in soft flexible laminæ varying in color from brown to black.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun mineralogy An orthorhombic-dipyramidal light brown mineral containing iron, silver, and sulfur.


from Wiktionary, Creative Commons Attribution/Share-Alike License

Sternberg +‎ -ite, after Count Kaspar Sternberg of Prague.


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