Jewellery tools
Work out the weight. Understand the metal content. Make a more informed comparison.
Weight converter
Convert between grams, gem carats and troy ounces. Gem carat weight is not the same as gold karat purity.
1 gem carat = 0.2 g. 1 troy ounce = 31.1034768 g. Troy ounces are not ordinary avoirdupois ounces. GIA: carat weight.
Gold content & value
Estimate fine-gold content from metal weight and karat purity. Add your own pure-gold price per gram for a metal-only estimate.
Use metal weight excluding stones. This estimate excludes labour, design, margins, taxes and buyback fees. It is not an appraisal or a purchase offer. Currency is not converted.
Tools for your research
Working features already available in the directory.
Compare companies
Add companies from their profiles to compare up to four side by side.
Find a vendor
Search companies and filter by business type, location, materials and services.
Explore by budget
Use recorded price ranges to start a shortlist. Confirm prices with the vendor.
Product bookmarks
Return to catalogue pieces you saved while researching.
Industry dashboard
Check source-dated metal, trade, exchange-rate and retail figures. These are not live quotes.
Catalogue research
Explore the items library. Full research access is a separate company subscription.
For material definitions and buying questions, start in the Jewellery Academy.