Free Diamond Price Calculator
Live diamond price estimates powered by 100+ retailers. Compare your spec against the real market in seconds.
Tell us the shape, carat, colour and clarity you are looking at. We compare your spec to thousands of similar diamonds currently for sale across 100+ retailers and show you a realistic price range, free, no signup.
How the estimator works, and how to read it
Every time you ask, we scan every diamond for sale across the retailers we track and find the ones that match your spec: same shape, a similar carat size, a nearby color and the same clarity. From that group we take the middle price per carat (the median) and multiply it by your carat weight. The number you see is the going rate across the market right now for a stone like that. It is not a quote and it is not a forecast, just a snapshot of where real prices sit today.
Confidence tells you how many similar diamonds we had to work with. High confidence means more than 100 matches, so the typical price is stable and you can trust it. Medium means 30 to 99 matches, directionally right but the number can shift by around 10% in either direction. Low means fewer than 30 matches, which is common for unusual specs. With low confidence, one retailer's pricing can skew the median, so treat the result as a rough compass rather than a target.
The low to high range shows where the middle 50% of similar diamonds are priced. A wide range (say 60% to 140% of the typical price) means retailers disagree on what this spec should cost, usually because cut quality or lab varies within the group. A narrow range means the market broadly agrees, which is normal for common specs like a 1ct round G VS1.
The estimator cannot see cut grade, polish, symmetry, fluorescence, grading lab or provenance, and each of those can move the real price materially. Two diamonds with identical shape, carat, colour and clarity can easily be 30% apart for legitimate reasons. Use the estimate as a sanity check: if a retailer quotes you 20% above the typical price, ask what is above spec, and if they are 20% below, ask what has been left off.
Frequently asked questions
How is this different from a Rapaport price?
Rapaport is a wholesale list price often tens of percent above what consumers actually pay. Carat Hunter computes a peer-median across live retail listings from over 100 public retailers, so you see what diamonds are selling for today, not what wholesalers print on a list sheet.
Does the calculator cover lab-grown diamonds?
Yes. Toggle origin between Natural and Lab grown. Each origin has its own peer pool and methodology, and lab-grown is typically priced 80 to 90 percent below an equivalent natural at the same shape, carat, colour and clarity.
Why is the price a range and not a single number?
Retailers price the same diamond very differently. The low to high range represents roughly the middle 50 percent of comparable listings. Anything significantly above or below that range warrants a closer look at why, often it is cut grade, lab choice, fluorescence or branding markup.
How often is the data refreshed?
Inventory across our retailers is monitored continuously and ingested in near real time. The peer-median cache rebuilds on a multi-hour cycle, so a fresh estimate is rarely more than a few hours stale.
What does the confidence label mean?
It reflects how many comparable listings sit in the peer pool. High means more than 100 matches, the typical price is stable. Medium means 30 to 99 matches, directionally right but the number can shift by around 10 percent. Low means fewer than 30 matches, treat as a rough compass rather than a target.
Should I use this to negotiate with a retailer?
Use it as a sanity check, not a quote. Two diamonds with identical 4Cs can legitimately differ by 30 percent based on cut grade, lab, fluorescence, and provenance, none of which the simple form captures. If a retailer quotes well above or well below the typical price, the estimate gives you a starting point for the right questions.
Why does the lab-grown price look the same as natural at unusual grades?
At lower colour and clarity grades (H or below, SI1 or below), lab-grown supply is thin and dominated by smaller boutique retailers, not the mass-market discounters that drive lab-grown prices at higher grades. The peer median is correct for the listings that exist, but it is not representative of the broader lab market. Stick to G or higher colour and VS2 or better clarity for reliable lab-grown comparisons.
Are the prices in my currency?
Yes. All medians are computed in USD then converted to your region's currency using daily live exchange rates.
Related insights
Estimates come from live listings across the retailers we track. Real prices vary with cut, polish, symmetry and the grading lab, so use this as a guide, not a quote.
Compare prices across 100+ retailers worldwide. Find the best deal on your perfect diamond.