CaratLibrary

CaratLibrary is your pocket reference for the world of precious metals and gemstones. Whether you're a collector, jeweller, hobbyist, or just curious, the app puts detailed information about dozens of materials right at your fingertips — from the chemical makeup of platinum to the best way to clean an opal.

Beyond the encyclopaedia, CaratLibrary includes practical care guides that walk you through cleaning, storing, and maintaining your pieces so they stay beautiful for years. Each guide is written in plain language with clear steps and helpful warnings about what to avoid.

The app also features interactive maps showing where major metals and gemstones are mined around the world, plus a directory of certified gemstone cutting companies. You can browse by location, explore what each site produces, and find reputable professionals who specialise in cutting and polishing.

Everything functions offline — no account is necessary, and no internet connection is required. Simply open the app and start your exploration.