About · Reviewed November 2026

About Diamond-Cost

A price book for a purchase most people make once, with no practice, against professionals who make it every day.

Why this site exists

Diamond pricing is opaque on purpose. There's no sticker index, grades hide more than they reveal, and the first number most buyers ever see is the one on the tag in front of them. Meanwhile the spread between a well-bought and a badly-bought ring at the same budget is routinely 30–50% — thousands of dollars decided by information that fits on a few pages.

These are those pages. No romance copy, no "your love story deserves," no quiz that ends in a sales call. Prices, levers, and the handful of rules that keep the money in your pocket.

How the numbers are made

Ranges summarize typical advertised prices for certified stones across major US online diamond retailers, normalized to the specs stated on each page (our "balanced" reference: round brilliant, G–H color, VS2–SI1 clarity, excellent cut, GIA or IGI certified). Setting and service figures come from commonly advertised retail pricing. Each page carries the date its figures were last reviewed.

Honest limitations: diamonds are not commodities, individual stones vary within any spec, local markets differ, and prices move — lab-grown prices especially have fallen fast for years and may keep falling. Treat every figure here as orientation: good enough to tell a fair quote from a bad one, never a substitute for comparing real certified stones side by side.

What this site is not

Not an appraiser — nothing here values your specific stone. Not a jeweler — we don't sell diamonds, settings, or anything else. Not investment advice — and if any site tells you diamonds are an investment, the FAQ explains why to close that tab.

Disclosure

Diamond-Cost may link to retailers, and some of those links may be affiliate links, meaning the site can earn a commission if you buy through them — at no change to the price you pay. Affiliate relationships never change the figures on these pages: ranges are set from market data first, and any retailer mentions follow from the numbers, not the other way around. If that ever appears not to hold, call it out — the contact is below.

Contact

Corrections, questions, or a price that looks stale: hello@diamond-cost.com. Market-moving corrections get reviewed first.