Ruby market statistics

Ruby

Color: red, purple red
Hardness: 9
Refractive index: 1.76 - 1.78
Density: 3.99 - 4.06
Chemical composition: Al2O3
Crystal structure: hexagonal
Origins: Burma, Sri Lanka, Thailand, Cambodia, Vietnam, Madagascar, Tanzania, Kenya.

Rubies, the red variant of corundum, are the most expensive gemstone after diamonds. The distinctive 'pigeons blood' colored rubies from Mogok (Burma, or Myanmar as it is now referred to) have the highest value. Specimens over 5 ct. as well as eye clean stones are very rare. Heat treatment is usually applied to improve their color and reduce small inclusions.

Ruby 5.10 cts.
Published under permission: Miguel Angel Lopez

The figures are based on Gemval's aggregated valuation statistics for the retail market. Irrelevant, controversial or repeat data are excluded from our analysis wherever possible. The figures are updated monthly.

Weight distribution for Ruby

Occurrence is represented in % for different weight categories.

Price distribution for Ruby

Occurrence is represented in % for different value intervals.

Clarity distribution for Ruby

Occurrence is represented in % for different clarity grades.

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Ruby market prices