Large Natural Pyrite Cube in Matrix | Spain ammonite Shafts are drilled down 100

Shafts are drilled down 100 to 200 feet below the surface to the geode bearing white clay

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Limestone (the outer grey rock which is the bentonite clay replaced with limestone)

Olenellus chiefensis was likely a benthic organism that inhabited shallow marine environments with soft substrates

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Large Natural Pyrite Cube in Matrix | Spain ammonite Shafts are drilled down 100These pyrite cubes may appear to be man made at first, but they are in fact completely natural! Originating from the "Ampliacin a Victoria" mine near Navajn, Spain, these cubes are renowned for their stunning shine, near perfect cubic formation, and sculptural appearance. A must have for any mineral collector! Cube size approx 23mm x 25mm Matrix approx 2. 5" x 1. 5"