RICHPIECE
Fine jewelry, luxury watches, and the guides and calculators behind every treasured piece.
From valuing your gold and silver and pricing a diamond to converting ring sizes, estimating a gemstone's carats, and decoding karat purity, RichPiece pairs free hands-on jewelry calculators with practical guides and a richly illustrated museum. Buy smarter, treasure longer.
Jewelry Tools & Calculators
Free tools for fine jewelry and precious metals — gold value calculator, silver value calculator, diamond price calculator, ring size converter, gemstone weight calculator, and gold karat & purity calculator.
Gold Value Calculator
Estimate the intrinsic melt value of any gold item from its weight, karat, and the live spot price — in grams, troy ounces, pennyweight, or kilograms
Silver Value Calculator
Estimate the melt value of coins, flatware, or jewelry from their weight, fineness (999, 925 sterling, 900, or 800), and the current silver spot price
Diamond Price Calculator
Estimate a diamond's price from its carat weight and price per carat — pick a 4Cs quality-tier preset or paste your own dealer figure for a precise result
Ring Size Converter
Turn a finger measurement in millimetres into US, UK/AU, and EU (ISO) ring sizes — enter the inner diameter or circumference and see every scale at once
Gemstone Weight Calculator
Estimate the carat weight of a mounted or loose stone from its length, width, and depth, its specific gravity, and its cut — no need to unmount or weigh it
Gold Karat & Purity Calculator
Convert gold karat to purity percentage and millesimal fineness, or reverse a purity percentage back to karat — instant, exact answers from 10k to 24k
Gems & Jewelry Museum
Wander an immersive museum of fine jewelry — the precious gemstones from diamond to emerald, the gold, platinum, and silver that hold them, the rings, necklaces, and crown jewels crafted from them, and the luxury watches and timepieces of horology, each in its own gallery, so you can get to know the stories behind every treasured piece: how each one is made, what makes it precious, and the craft behind fine jewelry.
Tour the museum →From the Journal
Fresh guides on gemstones and precious metals, diamonds and karats, fine jewelry and custom design, and luxury watches, plus practical tips for buying, valuing, and caring for every treasured piece.
Essential Organization Methods Skills Nobody Teaches You
If you have ever wondered how to elevate your understanding of general, you have come to the right place. This article distills years of expertise into actionable guidance you can…
Practical Stress Management Wisdom for Everyday Life
Many people underestimate the depth and complexity of general. What appears straightforward on the surface actually involves a rich tapestry of skills, knowledge, and carefully honed practices. As you work…
Personal Growth Strategies: What Every Beginner Should Know
Whether you are just beginning your journey into general or looking to deepen your existing expertise, this article offers valuable insights backed by research and practical experience. What sets this…
7 Proven Time Management Methods Strategies for Better Results
If you have ever wondered how to elevate your understanding of general, you have come to the right place. This article distills years of expertise into actionable guidance you can…
Why More People Are Embracing Problem Solving Approaches
Whether you are just beginning your journey into general or looking to deepen your existing expertise, this article offers valuable insights backed by research and practical experience. This is not…
Building a Critical Analysis Skills Toolkit That Works for You
The landscape of general has undergone significant transformation in recent years. New methods, tools, and philosophies have emerged, creating exciting opportunities for enthusiasts and professionals alike. As you work through…
Keep Learning
Practical know-how on gemstones, precious metals, jewelry design, and watches, plain-language explainers on the 4Cs, karats, hallmarks, and horology, and tips for first-time buyers and seasoned collectors alike — everything you need to dig deeper and buy with confidence.
Visit the Learn hub →