Gemstone Comparator

Choose two or three stones and compare what matters when you are deciding: hardness, toughness, whether it survives a daily ring, the price tier, the usual treatments and how to clean it.

What the columns mean

Hardness is scratch resistance on the Mohs scale; anything under 7 is scratched by household dust. Toughness is resistance to chipping and breaking, which is different: diamond is the hardest material but can chip, jade is softer but nearly unbreakable. Daily wear combines the two with stability against heat, light and chemicals. Price tier is for fine quality per carat, from affordable (1) to auction territory (5). Treatments are what is normally done to the stone and should be disclosed.

More tools

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Live spot price

Gold Calculator

Calculate the fine metal value of gold, silver, platinum or palladium jewelry, coins and scrap from the live spot price: weight, purity, currency, and what buyers typically pay.

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The 4Cs, priced

Diamond Price Estimator

Estimate the retail price of a natural or lab-grown diamond from carat, colour, clarity, cut and shape, and see what a buyer would typically offer for it.

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Pre-owned market

Watch Valuation

Estimate the pre-owned market value and the typical dealer offer for a luxury watch by brand, model, condition, box and papers.

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