Monthly Analysis
December 2025 Diamond Market Report
Data as of December 31, 2025
Diamond Market Snapshot
In December 2025, the CaratRadar Diamond Price Index stood at $4,090, reflecting the weighted average retail price across 6,893,334 certified diamonds tracked from leading diamond retailers worldwide. Natural diamonds averaged $6,218 compared to $2,606 for lab-grown equivalents, a ratio of 2.4x.
Shape-by-Shape Analysis
Month-over-month price changes by shape and diamond type.
Round
Lab Grown
$2,355
1,372,923 diamonds
vs last month
-4.8%Natural
$5,071
1,504,115 diamonds
vs last month
-1.6%Oval
Lab Grown
$3,072
621,487 diamonds
vs last month
-4.1%Natural
$8,589
312,352 diamonds
vs last month
-4%Cushion
Lab Grown
$3,212
264,364 diamonds
vs last month
+0.3%Natural
$10,572
131,783 diamonds
vs last month
-4.4%Princess
Lab Grown
$2,317
231,859 diamonds
vs last month
-1.3%Natural
$6,466
109,824 diamonds
vs last month
-5.3%Emerald
Lab Grown
$2,642
419,890 diamonds
vs last month
-2.1%Natural
$6,962
268,621 diamonds
vs last month
-3%Pear
Lab Grown
$2,342
369,966 diamonds
vs last month
-2.1%Natural
$5,561
222,618 diamonds
vs last month
-4.8%Marquise
Lab Grown
$2,269
236,895 diamonds
vs last month
-2.5%Natural
$5,635
62,962 diamonds
vs last month
-9.1%Radiant
Lab Grown
$2,883
368,375 diamonds
vs last month
-0.7%Natural
$12,130
79,156 diamonds
vs last month
-2.8%Heart
Lab Grown
$2,606
118,555 diamonds
vs last month
-0.7%Natural
$4,922
100,697 diamonds
vs last month
-6.5%Asscher
Lab Grown
$3,019
57,408 diamonds
vs last month
+1.4%Natural
$6,952
39,484 diamonds
vs last month
-3.6%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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