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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A scatter of loose round-brilliant cut diamonds beside a chrome jeweler's loupe on a clean white surface, evoking the light-performance grading that AGS Laboratories pioneered on the 0 to 10 cut scale

AGS Cut Grade: Full History of the 0–10 Scale and How to Read a Legacy AGS Report (2026)

The AGS cut grade history end-to-end — the 1996 launch of the 0–10 light- performance scale, the ASET methodology, the 2022 AGS Laboratories closure, GIA's acquisition of the AGS Ideal IP, and a line-by-line guide to reading a legacy AGS Platinum report against a modern GIA + AGS Ideal supplement.

6/28/2026 · 11 min read

An antique European cut diamond solitaire in a handcrafted platinum setting, lit warmly against a dark background to show the broad, saturated fire characteristic of period hand-cut rounds

Antique European Cut Diamond: History, Identification & 2026 Market Values

An antique European cut diamond can trade anywhere from $2,500 to $20,000+ per carat in 2026. Here's how to identify a genuine period stone, read its angles, and price it against the current collector market.

6/24/2026 · 11 min read

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

AGS vs GIA: Side-by-Side Grading Rubric, Methodology, and Resale Impact (2026)

AGS 0–10 light-performance cut grading vs GIA D–Z color and Excellent-to-Poor cut — a side-by-side rubric, the 2022 AGS Laboratories closure, GIA's acquisition of the AGS Ideal IP, and what each report is worth on resale.

6/6/2026 · 9 min read

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

2026 Lab-Grown Diamond Price Per Carat: $200–$1,800 IGI/GIA by Clarity

2026 lab-grown diamond price per carat by clarity — $200 (SI2) to $1,800+ (FL) on IGI and GIA-graded comps, by clarity grade FL to SI2 and size band. When to spend up on clarity, 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