What diamonds and gemstones are really worth

CaratWire is the buyer's-side desk for diamonds and colored gemstones — named grading labs, real price ranges, treatment and origin disclosure, and honest guidance on what to pay and where to buy. No marketing.

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Macro close-up of rough, uncut diamond crystals — clear octahedra alongside yellow and dark mineral crystals — illustrating that the same stone carries multiple simultaneous prices depending on the channel

Diamond Value vs Price: Reading the Two Different Numbers on Every Stone

Diamond value and diamond price are not the same number. The framing that separates a fairly priced stone from an overpriced one, using Rapaport and auction comparables instead of sticker math.

6/7/2026 · 5 min read

A round-brilliant-cut diamond solitaire ring in white gold with pavé shoulders, photographed against a deep blue background — the kind of mounted stone that sometimes qualifies for auction-house consignment

Auction vs Dealer Buyback: Where to Actually Sell a Diamond in 2026

Christie's and Sotheby's vs your local dealer for a used diamond. The thresholds, fees, and 2024–2026 hammer data that tell you which exit route matches your stone.

6/7/2026 · 6 min read

A scatter of loose round-brilliant cut diamonds next to a chrome jeweler's loupe on a clean white surface, illustrating the wholesale-market goods that drive the resale floor

Why Diamonds Lose Value the Moment You Buy Them: The Retail-to-Rap Spread

Why diamonds lose value the moment you walk out of the store. The retail markup, the Rapaport benchmark, and the structural reason a $7,000 ring is a $2,500 stone the next morning.

6/7/2026 · 5 min read

Macro close-up of rough, uncut diamond crystals — clear octahedra alongside yellow and dark mineral crystals — illustrating the raw material behind the secondary diamond market

Diamond Resale Value in 2026: Auction-House Data vs Dealer Buyback Reality

Diamond resale value, by channel, in 2026. Christie's and Sotheby's hammer data versus dealer buyback spreads, with per-carat numbers and the Rapaport delta you'll actually face.

6/7/2026 · 6 min read

Reading a GIA Laser Inscription: The 10-Digit Number That Verifies the Stone

How to find and read the GIA laser inscription on a diamond's girdle, what the 10-digit report number means, and how to use GIA Report Check to confirm the paper matches the stone in your hand.

6/6/2026 · 4 min read

A scatter of loose round-brilliant cut diamonds beside a chrome jeweler's loupe on a clean white surface, illustrating the range of cut quality inside the GIA Excellent grade

GIA Cut Grade vs AGS 0: The Light Performance Gap Inside Triple Excellent

GIA Triple Excellent is a wide bucket. The AGS Ideal 0 supplement isolates the genuine top of the cut range — here's what the gap means in dollars on a round brilliant in 2026.

6/6/2026 · 5 min read

Macro photograph of cut diamonds on a dark background — used to illustrate how fluorescence interacts with daylight and UV

GIA Fluorescence Grades Explained: When None, Faint, Medium, and Strong Move the Price

GIA fluorescence grades from None to Very Strong, what each one looks like under daylight, and the 10–15% trade discount on strong blue that buyers can use as leverage.

6/6/2026 · 5 min read

A scatter of loose round-brilliant cut diamonds beside a chrome jeweler's loupe on a clean white surface, evoking professional diamond cut grading

GIA vs AGS Grading Scales: Why the AGS 0 Still Matters Inside GIA

GIA grades cut Excellent through Poor. AGS graded cut 0 through 10 on light performance. AGS Labs closed in 2022 and GIA absorbed the science — here's how the two scales line up in 2026.

6/6/2026 · 5 min read

A scatter of loose round-brilliant cut diamonds beside a chrome jeweler's loupe on a clean white surface

Lab-Grown Diamond Price Per Carat by Clarity: 2026 Spec Grid

Lab-grown diamond price per carat in 2026, broken out by clarity grade from FL to SI2 and by size band. Plus when to spend up on clarity and when to take the eye-clean SI1.

6/4/2026 · 5 min read

A round-brilliant-cut diamond solitaire ring in white gold with pavé shoulders, photographed in close-up against a deep blue background

Lab-Grown Diamond Resale Value in 2026: The Per-Carat Reality Check

Lab-grown diamond resale values in 2026 are sitting at 5–20% of original retail across most exit routes. Here's the per-carat math by size, by lab report, and what to do if you bought one in 2021.

6/4/2026 · 5 min read

Macro photograph of rough synthetic lab-grown diamond crystals — bright yellow nitrogen-rich octahedral crystals beside a colorless crystal grown from pure carbon, on a dark background

CVD vs HPHT Lab-Grown Diamonds: How the Two Methods Differ at the Counter

CVD and HPHT lab-grown diamonds are both real diamond, but they grow differently and carry different telltales under a loupe. Here's how to spot them and which to buy in 2026.

6/4/2026 · 5 min read

Loose round-brilliant-cut diamonds beside a chrome jeweler's loupe on a white surface, evoking professional diamond grading

IGI vs GIA Lab-Grown Grading: What the 2025 Report Format Change Means

IGI still prints the 4Cs on lab-grown diamond reports. GIA dropped to a Premium/Standard tier in October 2025. Here's which report to ask for, and how to price the difference.

6/4/2026 · 5 min read