Large Natural Pyrite Cube in Matrix | Spain ammonite Limestone (the outer grey rock

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

Trilobites are a group of extinct marine artiopodan arthropods that form the class Trilobita

5" x 3" x 1"

Large Natural Pyrite Cube in Matrix | Spain ammonite Limestone (the outer grey rockThese 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"