Lucy's Diamond Insights
Deep market analysis, price trends, and diamond buying intelligence from Lucy, our resident diamond market analyst.
Subscribe via RSS2 Carat Oval Diamond Price in 2026
As of October 2026, the median 2 carat oval sits at $17,968 natural and $1,117 lab-grown across our index. We break down the price band, the most stocked grade cells, and the lab-grown grades that cost more without giving you more.
GIA Report Check, What the Number Tells You and What It Does Not
A GIA report check confirms the paper, not the diamond sitting in the box. We walk through the three lookups worth running, the fields that actually move price, and the ways listings quietly misquote a report.
1 Carat Oval Diamond Price, What the Market Charges Right Now
In October 2026 the median 1 carat oval sits at $3,389 natural and $482 lab-grown, a ratio of 7.0 to 1. We break down which colour and clarity cells are the real value, why lab-grown grades barely move the price, and how 40% of these stones are listed at more than one retailer.
Lab-Grown vs Natural at 1 Carat, the G VS1 Round Benchmark
In October 2026 a natural 1 to 1.5ct round G VS1 has a median price of $4,750 across our listings, while lab-grown sits at $327. That's a ratio of 14.5 to 1, and the dearest lab stones still cost less than a quarter of the cheapest natural ones.
How Much Does a 3 Carat Diamond Cost
The median 3 carat natural diamond in our index costs $38,806 in October 2026, while the median lab-grown stone costs $1,363. We break down the price band, the grade cells that offer real value, and where the D colour premium stops making sense.
IGI Report Check, Verifying a Lab-Grown Diamond Certificate
IGI grades more than nine in ten certified lab-grown diamonds in our index, so knowing how to check an IGI report is the most useful skill a lab-grown buyer can have. Here are the four steps, the six ways listings misquote a report, and what to do when the number is hidden.
How Much Does a 1.5 Carat Diamond Cost
A 1.5 carat natural diamond costs $7,569 at the median across October 2026 listings; lab-grown sits at $564. The P10 to P90 spread runs $3,440 to $16,116 for natural and $246 to $1,670 for lab-grown. Knowing which colour and clarity cells deliver value changes what you should pay.
Brilliant Earth and 77 Diamonds List the Same Stones and Here Is How Many
480,846 diamonds are simultaneously listed on both Brilliant Earth and 77 Diamonds, representing 46.2% of Brilliant Earth's entire catalogue. These are not similar stones; they are identical certified diamonds from shared wholesale feeds, independently priced by each retailer. We break down the scale of the overlap and what it means for anyone comparing these two retailers right now.
How Much Does a Half Carat Diamond Cost
At $995 median, natural half carat diamonds sit at a strong value per carat compared to crossing the 1ct threshold. Lab-grown half carats sit at $259 median, a ratio of 3.8 to 1 against natural. We break down what moves the price inside that band and which colour and clarity cells are worth buying.
Diamond prices in September 2026: natural climbs while lab-grown keeps falling
Natural diamonds rose 7.52% to a median of USD 2,334.70 per carat in September 2026, while lab-grown fell 4.77% to USD 443.12 per carat, widening the natural to lab ratio to 5.3 to 1. Pear and radiant cuts led the natural rally with gains above 13%, while lab-grown emerald and oval shapes dropped more than 7%. The cross-retailer spread for lab-grown remains at a median of 218.9%, meaning comparison shopping still delivers far more savings than timing the market.
GCAL Certificate Lookup and Report Check for Lab-Grown Diamonds
GCAL certifies lab-grown diamonds almost exclusively, holding 0.7% of our live index at a median of $886 per carat. Running a proper GCAL report check means verifying the certificate on GCAL's own site, then checking what those grades actually cost across 110 retailers. This post covers the steps, the fields that move price, and how to handle a retailer who won't share the number.
Lab-Grown vs Natural at 2 Carats, the H VS2 Oval Test Case
The median natural 2 carat oval H VS2 costs $20,630. The lab-grown equivalent costs $810. At a ratio of 25.5 to 1, these two stones are no longer competing in the same market, and the certification and resale numbers explain why that gap holds.