This interesting crystal grows very quickly and easily.
Potash Alum Crystal
This is a crystal of potassium alum or potash alum. Food coloring was added to these crystals, which are clear when the alum is pure.
Anne Helmenstine
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This is a crystal of potassium alum or potash alum. Food coloring was added to these crystals, which are clear when the alum is pure.
Anne Helmenstine