Radiant|Natural|GIA

1.51ct K SI2 Radiant Natural Diamond

EX • K/SI2 • GIA 2526478969

Certificate GIA 2526478969

Diamond specifications and retailer prices

From $2,451 USD
As of November 2, 2026
Save $1,835 USD (43%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $5,343 USD at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2526478969. Listed at 8 retailers as of November 2, 2026, with a 75% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
K
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.54°
Pavilion angle30.24°
OriginNatural
Grading LabGIA
CertificateGIA 2526478969
Dimensions7.33 × 5.65 × 3.87 mm
L/W Ratio1.30
Top View
7.33 mm5.65 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2526478969
Side View
Table 67.0%Crown 44.54°GirdlePavilion 30.24°CuletDepth 68.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: $2,451 USD|Low: $2,450 USD|High: $4,531 USD|Avg: $2,945 USD|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 1$2,451 USD
Retailer 5$2,468 USD
Retailer 4$2,540 USD
Retailer 2$2,746 USD
Retailer 6$2,911 USD
Retailer 3$4,286 USD

28 data points across 6 retailers

8 retailers$2,451 USD to $4,286 USD

A
Cheapest Retailer
-
$2,451 USD
Retailer 2
-
$2,508 USD
View
Price last confirmed 31 days ago
A
Retailer 3
-
$2,540 USD
View
Retailer 4
-
$2,555 USD
View
Price last confirmed 42 days ago
Retailer 5
-
$2,673 USD
View
Price last confirmed 38 days ago
B+
Retailer 6
-
$4,286 USD
View
Retailer 7
-
$5,243 USD
View
Price last confirmed 32 days ago
Most Expensive
NZ Jewellers
e1559247-2f49-43c2-ba75-145ed80612e0 · Sep 27
$5,343 USD
View
Price last confirmed 40 days ago
7 more retailers have this diamond
Prices start from $2,451 USDSave up to $1,835 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.51ct Radiant
$2,451 USD