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Gypsum “Ram’s Horn”

Chihuahua, Mexico Bruce Museum Collection 2019.4.48 Gift of Robert R. Wiener

Gypsum is one of the softest minerals and can thus take on many forms under the right growth conditions. The unusual shape of this specimen is known as a “ram’s horn”. As the long crystals were slowly precipitated out of saturated waters, the cluster shifted and twisted. The end product is this unique curled specimen.

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