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Chalcedony - Malawi
tetragonal
Saudi Arabia
Chemical formula
Rubí Arcilla Chalcedony - MalawiChemical formula Al2O3 : Cr Crystalline system trigonal Class oxides Origin Mahajanga, Madagascar Size Medium: 2. 00 3. 00 cm Large: 3. 00 4. 00 cm Massive natural ruby. In some you can see its hexagonal shape. It is a reddish gem, if it is purple, it is called balaj. It owes its color to the iron and chromium metals with which this variety of corundum is associated. Red corundums are called ruby and all other colors, including pink, are called
