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A small ruby boule, still attached to the rod, produced by the Verneuil process
A small ruby boule, still attached to the rod, produced by the Verneuil process
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A ruby crystal from Dodoma Region, Tanzania
A ruby crystal from Dodoma Region, Tanzania
Main ruby producing countries
Main ruby producing countries
Crystal structure of ruby showing the substitution of Al3+ ions (blue) with Cr3+ (red). The substitution density of Cr3+ ions in this model is approxi
Crystal structure of ruby showing the substitution of Al3+ ions (blue) with Cr3+ (red). The substitution density of Cr3+ ions in this model is approximately 2%, approximating the maximum doping normally encountered.
A naturally occurring ruby crystal
A naturally occurring ruby crystal