Commons Attribution 4.0 truetrue English single crystal of chromium potassiumalum Wikimedia username: Neodimmus author name string: Neodimmus URL: https://commons
sulfate (MgSO4), while small and circular crystals (upper part) are potassiumalum. Spanish Roca con cristales creados artificialmente encima. Los cristales
DescriptionPotassiumalum octahedral crystal.jpg English: Potassiumalum crystal with octahedral shape. Note that there are additional faces which bridge