An unusual, highly elongated single crystal! The Chinese bouronites don't seem
to twin as from other localities, and so this is a strange form.
Origin: Yaoganxian Mine, Hunan Province, China
Sample size: 2.7 x 1.2 x 0.8 cm
Origin: Vibras Vein, Machacamarca Mine, near Cotavi, Potosi Dept, Bolivia
Sample size: 3.5 x 3 x 2.5 cm
Bournonite on
siderite
Origin: Horhausen, Germany
Sample size: 4.5 x 4 x 2.5 cm
Cluster of two intergrown, (but UNtwinned) bournonite crystals grown against
the termination of a
quartz crystal!
Origin: Yaoganxian Mine, Hunan Province, China
Sample size: 7 x 4 x 3 cm
Origin: Horhausen, Westerwald, Germany
Sample size: 3.7 x 2 x 2 cm
Origin: Quirivilca, La Libertad, Peru
Sample size: 2.5 x 2.5 x 2 cm
Origin: Schmiedefeld, near Meiningen, Thuringia, Germany
Sample size: 5 x 5 x 3.5 cm
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