Capture a piece or choose an image.
Start with a photo of a ring, necklace, bracelet, earring, coin or loose stone.
Jewelry Identifier — CaratAI
Identify jewelry from a photo.
Use CaratAI to review visible details such as jewelry type, materials, style and possible gemstones. Any value range is an AI estimate, not a professional appraisal.
AI-generated observations and value estimates are informational only.
What CaratAI does
Explore visible details and ask a better next question.
A clear photo can give the app a starting point for describing visible features. Explore a possible jewelry type, material or style, then ask a follow-up question or keep the result with your collection.
Inside the app
Photo insights, follow-up answers and saved scans.
Explore possible type, materials and style.
See AI-generated observations about visible characteristics and possible materials.
Follow up, then keep useful notes together.
Ask AI follow-up questions and save identified pieces to a personal collection.
Real feedback from Google Play
Straight from a Google Play review.
★★★★★
“Just what I needed”
Free tools
Start with a useful jewelry check.
Look up a common stamp or calculate a metal-only estimate with a price you enter.
Metal value
Gold Melt Value Calculator
Estimate the metal-only value of gold from its weight, fineness and a gold price you enter. Gemstones, design and resale value are not included.
Open toolMarks and materials
Jewelry Hallmark Quick Reference
Search common jewelry fineness marks and see what the numbers can mean. A stamp is a clue to research, not proof of authenticity or metal content.
Open toolSizing
Ring Size Converter (US, UK, EU, Japan, mm)
Convert a ring size between US, UK letters, EU/ISO, Japanese sizes and inner diameter in mm. Includes a size chart. Free, in your browser.
Open toolGemstones
Diamond MM to Carat Calculator (All Shapes)
Estimate a diamond’s carat weight from its length, width and depth in mm for round, oval, princess, pear and more. An estimate, not a weighing.
Open toolGemstones
Carat to MM Converter (Round Diamond Size)
See the approximate diameter of a round brilliant diamond for any carat weight, with a size chart from 0.25 to 3 carats. Free, in your browser.
Open toolMetal value
Silver Melt Value Calculator
Estimate the metal-only value of sterling (925), fine (999) or coin (900) silver from weight and a price you enter. No live price feed.
Open toolMetal value
Platinum Melt Value Calculator
Estimate the metal-only value of platinum jewelry (950, 900, 850) from its weight and a price you enter. Stones and design are not included.
Open toolMetal value
Gold Karat to Purity Converter (K, ‰, %)
Convert gold karat to fineness (parts per thousand) and percent, or back. See the matching hallmark, e.g. 14K = 585. Free, in your browser.
Open toolSizing
Necklace Length Guide and Calculator
Find the style name for a chain length (choker, princess, matinee, opera, rope) and how far it hangs below your neck. In inches or cm. Free.
Open toolSizing
Bracelet Size Calculator (Wrist to Length)
Turn your wrist measurement into a bracelet length for a snug, comfort or loose fit, in cm or inches. Free and in your browser.
Open toolWhere CaratAI is honest
An AI estimate is not an appraisal.
CaratAI offers image-based estimates and explanations. It is not a certified gemological evaluation, a professional appraisal, or proof of authenticity. For insurance, sale, estate or high-value decisions, consult a qualified independent professional.
Blog
Guides we wrote and update
Diamonds
How to tell if a diamond is real: myths and reliable checks
The fog test, the water glass and the newspaper trick are everywhere, but none of them can prove a diamond is real. Here is what home checks can honestly tell you, what a jeweler's tester measures, and how a grading report settles the question.
Read article
Gold value
Gold price drop: what it means for the value of your gold jewelry
Spot gold fell below $3,900 an ounce on October 30, 2026, its lowest level in more than a year. Here is how a falling gold price changes the melt value of your rings and chains per gram by karat, what it does and does not do to buyer offers, and how to recalculate your own pieces.
Read article
Marks and materials
Gold filled vs gold plated vs vermeil: what the labels mean
Gold filled, gold plated and vermeil all put a layer of gold over another metal, but the amount of gold, the base metal and the marks differ. Here is what each label means under the US FTC Jewelry Guides and how to read GF, RGP, GEP and HGE stamps.
Read articleFrequently asked questions
Jewelry questions people ask
What a photo can help you explore, and where a qualified professional is still needed.
What details can CaratAI identify from a photo?
CaratAI can offer AI-generated observations about visible jewelry type, style, apparent materials and possible gemstones. These are suggestions to review, not confirmed findings.
Is a CaratAI value estimate a professional appraisal?
No. A value range is an image-based AI estimate. It does not replace a qualified independent appraisal or gemological evaluation.
Can a photo prove that a diamond or gold is real?
No. A photo cannot verify gemstone authenticity or metal purity. Ask a qualified professional to examine and test a piece when the answer affects an important decision.
How should I photograph jewelry?
Use a sharp, well-lit photo that shows the whole piece. Add a separate close-up when a hallmark, clasp or setting is the detail you want to inspect.
Where can I download CaratAI?
Use the App Store or Google Play links on this page to check current availability and app details.
A first look starts with a photo
Snap a photo, start a question.
Take a first look, keep the uncertainty in view, and bring better questions to your next conversation with a jewelry professional.