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Old 03-12-2012, 07:49 PM   #366
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Exclamation Crystal structure of Ruby

Some rubies show a three-point or six-point asterism or "star". Furthermore, rubies can show colour changes—though this occurs very rarely—as well as chatoyancy or the "cat's eye" effect... 27 – Consorts and co-rulers Ferdinand II of Aragon and Isabella I of Castile initiate the Spanish Inquisition (looking for heretics and unconverted Jews)...Magdalen College School, Oxford, established by William Waynflete...
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