Your pocket encyclopedia of precious gems & metals. Explore gemstones, calculate metal weights, and discover legendary treasures — all offline.
Download on Google PlayComprehensive database of diamonds, rubies, emeralds, sapphires and more. Learn about properties, origins, history, and identification characteristics.
Complete reference for gold, silver, platinum, and palladium. Understand purity standards, alloys, hallmarks, and market classifications.
Precise weight calculations for precious metals. Choose your metal and purity, enter dimensions, and get instant results in grams, troy ounces, or kilograms.
Discover the legends behind the world's most celebrated gems. From the Hope Diamond to the Star of India — history, mystery, and legendary treasures.
Essential safety information for handling dangerous minerals. Learn which stones and metals require special care, proper handling techniques, and health precautions.
No internet connection required. All encyclopedic content, calculators, and reference materials are stored locally on your device. No ads, no tracking.
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Browse gemstones, metals, and legendary stones. Search, bookmark, and learn at your own pace.
Use the metal weight calculator, check purity standards, and reference safety guidelines — all offline.