KRENNERIT, CRESSON MINE, CRIPPLE CREEK, COLORADO, USA (small cabinet)
Krennerit ist ein orthorhombisches Goldtellurid-Mineral, das unterschiedliche Mengen an Silber in seiner Struktur enthalten kann. Seine Formel ist AuTe2, obwohl Exemplare gefunden wurden, bei denen bis zu 24 % des Goldes durch Silber ersetzt wurden ([Au0.77Ag0.24]Te2). Im Gegensatz zu den chemisch ähnlichen Gold-Silber-Telluriden Calaverit und Sylvanit, die monoklin sind, ist Krennerit orthorhombisch.
Seine Farbe reicht von silbrig-weiß bis messinggelb. Krennerit hat eine spezifische Dichte von 8,62 und eine Härte von 2,5. Es wird typischerweise in Hochtemperatur-Hydrothermalumgebungen gefunden.
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