A nice specimen with several well-formed jet black Neptunite crystals and one small Benitoite on matrix from the type locality for Benitoite, The Gem Mine in San Benito County, California.
Measures 2.22 x 1.24 x 09 inches, 5.6 x 3.2 x 2.3 centimeters.
B & L Minerals
3 × 2 × 2 in
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This piece glitters! Stunning color contrast of green Siderite “Blades” with brassy iridescent Chalcopyrite, whitish Calcite, and gray Tetrahedrite crystals in this specimen. The green blades of Siderite in this piece are very rare! Several of the Siderite blades are at least 0.5 inch long. The Calcite crystals are flattened and translucent. The luster of the Siderite is vitreous while the Chalcopyrite and Tetrahedrite have a brilliant metallic luster.