Ruby
Rubies can command the highest per-carat price of any coloured stone. Trace elements that become part of the mineral’s crystal structure cause variations in its colour. Chromium is the trace element that causes ruby’s red colour.
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Ruby
Rubies can command the highest per-carat price of any coloured stone. Trace elements that become part of the mineral’s crystal structure cause variations in its colour. Chromium is the trace element that causes ruby’s red colour.
