Superb specimen of creedite, a calcium aluminum sulfate, in good bright orange crystals.
Its color is most often yellow-orange but it is also found in colorless or purple. Creedite is a rare mineral named after the town of Creede in Colorado (USA) where it was discovered in 1916.
This excellent specimen, with an impeccable presentation, comes from the Navidad mine in Durango, Mexico.
Below is a video of these creedite crystals from Mexico:
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