Updated
Across 13 platinum diamond rings scanned with GemstoneAI, the middle value was $4,200. Half came in between $4,150 and $6,500.
From 13 scans by 10 people in the GemstoneAI app, April 16, 2026 to August 25, 2026, with test and staff accounts left out and no one person making up more than a quarter of them. Each figure is a first-read fair market estimate from photos, about what a mainstream jeweler would sell a similar item for. They are not appraisals, sale prices or offers. How GemstoneAI values jewelry.
Diamond value turns on the 4Cs: carat, color, clarity and cut. A lab-grown diamond looks the same as a natural one and costs far less, and a photo cannot tell them apart, so a lab report settles it. Lab-grown vs natural diamond.
Platinum is dense, so a platinum ring holds more metal than a gold one of the same size. 950 platinum is worth about $46.85 a gram as metal today. Look for PT950, 950 or PLAT. White gold looks much the same once it is rhodium plated, so the stamp is what tells them apart.
A signed maker, age and good condition push a value toward the top of the range. Small or included stones, heavy wear and missing stones pull it toward the bottom.
Photograph it, then take a close-up of the stamp. GemstoneAI identifies the stone, reads the metal and gives a first-read value with similar items for sale. Your first scan is free.
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Across 13 GemstoneAI scans, the middle first-read value was $4,200, and half came in between $4,150 and $6,500. Yours depends on the stone's size and quality, the metal and its weight, and the maker.
Less than these figures. They are fair market estimates, about what a mainstream jeweler would sell a similar item for, and dealers and pawn shops buy below that. Know the melt value of the platinum first, since no fair offer should fall far below it.