Monthly Analysis
August 2025 Diamond Market Report
Data as of August 31, 2025
Diamond Market Snapshot
In August 2025, the CaratRadar Diamond Price Index stood at $4,258, reflecting the weighted average retail price across 4,504,522 certified diamonds tracked from leading diamond retailers worldwide. Natural diamonds averaged $6,546 compared to $2,924 for lab-grown equivalents, a ratio of 2.2x.
Shape-by-Shape Analysis
Month-over-month price changes by shape and diamond type.
Round
Lab Grown
$2,852
924,602 diamonds
vs last month
+8.2%Natural
$5,222
904,006 diamonds
vs last month
+16.6%Oval
Lab Grown
$3,680
393,104 diamonds
vs last month
+6.2%Natural
$9,278
168,692 diamonds
vs last month
+9.7%Cushion
Lab Grown
$3,334
193,122 diamonds
vs last month
+6.5%Natural
$10,956
85,413 diamonds
vs last month
+0.6%Princess
Lab Grown
$2,492
171,480 diamonds
vs last month
+6%Natural
$7,552
66,230 diamonds
vs last month
-5.3%Emerald
Lab Grown
$2,755
316,913 diamonds
vs last month
+11.5%Natural
$7,049
165,719 diamonds
vs last month
+9.6%Pear
Lab Grown
$2,552
271,354 diamonds
vs last month
+15.2%Natural
$6,274
111,287 diamonds
vs last month
+9.8%Marquise
Lab Grown
$2,374
155,030 diamonds
vs last month
+3.8%Natural
$6,337
29,974 diamonds
vs last month
+5.8%Radiant
Lab Grown
$3,005
283,086 diamonds
vs last month
+14.6%Natural
$12,581
49,742 diamonds
vs last month
+5.1%Heart
Lab Grown
$2,717
93,698 diamonds
vs last month
+17.2%Natural
$5,398
52,137 diamonds
vs last month
+2.9%Asscher
Lab Grown
$2,921
43,425 diamonds
vs last month
-2.8%Natural
$6,780
25,508 diamonds
vs last month
-2.1%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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