Check the price
Updated November 2026
Diamonds feel unpriceable at the counter — that's the point of the counter. But certified stones are a commodity with public prices, and any quote can be benchmarked in two minutes. Here's the board.
The check: normalize the quote to its certified specs, compare against the benchmarks below, and apply the 15% rule — a quote more than ~15% over an identical-spec stone online is your cue to negotiate with a screenshot, or leave.
The 2026 benchmark board
Loose round stones, G–H color, VS2–SI1 clarity, excellent cut — the quality range most buyers actually purchase. Add roughly $250–$2,000 for the setting depending on style and metal.
| Carat | Natural | Lab-grown | Lab saves |
|---|---|---|---|
| 0.50 ct | $1,500–$3,500 | $300–$700 | ~75% |
| 1.00 ct | $3,500–$6,000 | $600–$1,200 | ~80% |
| 1.50 ct | $7,000–$12,000 | $1,000–$2,000 | ~83% |
| 2.00 ct | $12,000–$20,000 | $1,800–$3,500 | ~84% |
| 3.00 ct | $25,000–$42,000 | $4,000–$8,000 | ~85% |
U.S. retail ranges, late 2026. Natural prices step up sharply at the "magic" weights (0.50, 1.00, 1.50, 2.00); lab pricing is flatter.
Run it
- Get the quote itemized. Stone and setting as separate line items, with the stone's report number. A single blended number is where markup hides.
- Comp the stone online. Search certified inventory for the same carat/color/clarity/cut. Two minutes. Screenshot the closest match.
- Apply the 15% rule. Local jewelers deserve some margin for service — 10–15% over online is fair. 40% over is a donation.
- Try the buy-shy move. A 0.90 ct stone runs 15–25% less than a 1.00 ct and looks identical on the hand (6.3 vs 6.5 mm). Works at every magic weight; works best on natural.
- Budget the last 10%. Sales tax, insurance (~$1–$2 per $100/yr), resizing. The quote isn't the cost; the cost is the quote plus the boring parts — locked in at check 10.
Where the money goes
On a typical ring, the center stone is 75–85% of the price, the setting 10–20%, and tax-plus-extras the rest. Which means the stone decisions — this check and check 4 — move the total ten times more than anything else. Agonize proportionally.