Berryite

Berryite is a mineral with the formula Pb₃(Ag,Cu)₅Bi₇S₁₆. It occurs as gray to blue-gray monoclinic prisms. It is opaque and has a metallic luster. It has a Mohs hardness of 3.5 and a specific gravity of 6.7.

Additional recommended knowledge

Weighing the right way

Don't let static charges disrupt your weighing accuracy

Recognize and detect the effects of electrostatic charges on your balance

It was first identified in 1965 using X-ray diffraction by mineralogist Leonard Gascoigne Berry (1914-1982). It is found in Park and San Juan counties in Colorado. It occurs in sulfide bearing quartz veins in Colorado and with siderite-rich cryolite in Ivigtut, Greenland.

References

• Webmineral data
• Mindat with location data
• Mineral Data Publishing - PDF