Casa Jewels Resources

Jewellery Resources & Tools

Free tools and reference guides for jewellers, designers, gemstone buyers and jewellery businesses.

Calculator

Precious Metal Weight Calculator

Convert wax or 3D printed resin to gold, silver, platinum and palladium using specific gravity reference values.

Open Calculator → Reference Chart

Diamond Shapes & Size Chart

MM-to-carat conversion for popular diamond shapes including round, oval, emerald, cushion, pear, radiant and more.

View Chart → Reference Chart

Gemstone Size Guide

Reference chart for calibrated gemstone dimensions across popular shapes and stone types.

View Guide → Reference Chart

Ring Size Chart

International ring size conversion table including US, UK, EU, Japanese and millimetre measurements.

View Chart →

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