Interactive
Tools
Seven tools that turn a vague question into a number or a shortlist. Everything runs in your browser, every result can be shared, and each one can hand you over to a vetted jeweler or buyer if you want a real offer.
Live spot price
Gold Calculator
Calculate the fine metal value of gold, silver, platinum or palladium jewelry, coins and scrap from the live spot price: weight, purity, currency, and what buyers typically pay.
OpenThe 4Cs, priced
Diamond Price Estimator
Estimate the retail price of a natural or lab-grown diamond from carat, colour, clarity, cut and shape, and see what a buyer would typically offer for it.
OpenPre-owned market
Watch Valuation
Estimate the pre-owned market value and the typical dealer offer for a luxury watch by brand, model, condition, box and papers.
OpenUS, UK, EU, Japan
Ring Size Converter
Convert ring sizes between US, UK, EU and Japanese systems from the inside diameter or circumference of a ring, with instructions for measuring at home.
OpenWhat your budget buys
Engagement Ring Budget Planner
See what an engagement ring budget buys in three directions: balanced, bigger stone, finest quality, natural and lab-grown, with setting and metal included.
OpenModern and traditional
Birthstone Finder
Find the modern and traditional birthstones for any month, with the meaning, durability and gift ideas for each, linked to the gemstone profiles.
OpenSide by side
Gemstone Comparator
Compare up to three gemstones side by side: hardness, toughness, daily-wear suitability, price tier, treatments, origins and care.
OpenEight questions
Jewelry Style Quiz
Classicist, Minimalist, Maximalist, Romantic, Collector or Modernist? Find your signature and the stones that fit it.
Take the quizHow the tools work
Everything runs in your browser. The Gold Calculator uses the live prices from our server; the Diamond Price Estimator and the Engagement Ring Budget Planner use a price grid maintained from current wholesale and retail data; the Watch Valuation uses a table of pre-owned market ranges for the references that make up most of the market. All three give ranges, not appraisals, and all three are close enough to tell you when a price is wrong.
Every result can be shared as a link or an image card, and every tool can hand your brief to a vetted jeweler or buyer with one click. Nothing you enter leaves your device unless you do that.
Prefer a person to a calculator?
Give us the brief and the budget. Up to three vetted jewelers reply within two working days, free of charge.