This is a pyrite concretion that somewhat fits the colour bronze (bronze-ish?).
It formed in shale from Tea Cove, Newfoundland, Canada.
The ram shape may have formed around a trilobite fossil.
7.5cm x 5.5cm x 2.0cm
More from Wikipedia
A concretion is a hard, compact mass of sedimentary rock formed by the precipitation of mineral cement within the spaces between the sediment grains. Concretions are often ovoid or spherical in shape, although irregular shapes also occur. The word ‘concretion’ is derived from the Latin con meaning ‘together’ and crescere meaning ‘to grow’. Concretions form within layers of sedimentary strata that have already been deposited. They usually form early in the burial history of the sediment, before the rest of the sediment is hardened into rock. This concretionary cement often makes the concretion harder and more resistant to weathering than the host stratum. There is an important distinction to draw between concretions and nodules. Concretions are formed from mineral precipitation around some kind of nucleus while a nodule is a replacement body.
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Inspired by Jennifer Nicole Wells’ One Word Photo Challenge: Bronze