A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c13.15
A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c13.15
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v1.c13.15
8 Faces and 6 angels” might possibly also refer to the hexagonal prism with basal planes, a common form of corundum, which gives the variety of colours referred to even more perfectly than the spinels.