Monthly Analysis
May 2026 Diamond Market Report
Data as of May 31, 2026
Diamond Market Snapshot
In May 2026, the CaratRadar Diamond Price Index stood at $3,335, reflecting the weighted average retail price across 10,154,229 certified diamonds tracked from leading diamond retailers worldwide. Natural diamonds averaged $5,480 compared to $2,025 for lab-grown equivalents, a ratio of 2.7x.
Shape-by-Shape Analysis
Month-over-month price changes by shape and diamond type.
Round
Lab Grown
$1,728
2,277,937 diamonds
vs last month
-7.1%Natural
$4,555
1,996,018 diamonds
vs last month
-0.8%Oval
Lab Grown
$2,278
1,065,605 diamonds
vs last month
-6.6%Natural
$7,422
426,721 diamonds
vs last month
-1.9%Cushion
Lab Grown
$2,574
393,910 diamonds
vs last month
-9.9%Natural
$9,672
174,479 diamonds
vs last month
-0.8%Princess
Lab Grown
$1,888
301,917 diamonds
vs last month
-7.9%Natural
$5,200
148,224 diamonds
vs last month
-5.3%Emerald
Lab Grown
$2,263
538,323 diamonds
vs last month
-4.7%Natural
$6,158
351,259 diamonds
vs last month
-1.2%Pear
Lab Grown
$1,861
576,829 diamonds
vs last month
-8.4%Natural
$5,012
324,486 diamonds
vs last month
+2.2%Marquise
Lab Grown
$1,880
406,383 diamonds
vs last month
-5.8%Natural
$4,668
117,660 diamonds
vs last month
-2%Radiant
Lab Grown
$2,435
504,662 diamonds
vs last month
-6.1%Natural
$10,066
110,085 diamonds
vs last month
-4.1%Heart
Lab Grown
$2,103
157,998 diamonds
vs last month
-9%Natural
$4,318
137,628 diamonds
vs last month
+0.7%Asscher
Lab Grown
$2,491
79,351 diamonds
vs last month
-7.9%Natural
$5,363
64,754 diamonds
vs last month
-1.6%Key Takeaways
- ✓Lab-grown diamonds continue to offer significant value compared to natural equivalents.
- ✓Round and oval cuts remain the most liquid market segments with the most comparable listings.
- ✓Price spreads between retailers vary significantly, so use CaratRadar to find the best price for the exact same certified stone.
About This Report
This report is generated automatically from CaratRadar's live diamond pricing database, which aggregates daily data from major diamond retailers. All prices are averages across active listings and may not reflect individual diamond prices. Data updated daily.
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