Radiant|Natural|GIA

1.51ct K SI2 Radiant Natural Diamond

EX • K/SI2 • GIA 2526478969

Certificate GIA 2526478969

Diamond specifications and retailer prices

From £1,831 GBP
As of November 2, 2026
Save £1,371 GBP (43%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,992 GBP 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
Colour
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: £1,831 GBP|Low: £1,830 GBP|High: £3,385 GBP|Avg: £2,200 GBP|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 1£1,831 GBP
Retailer 5£1,844 GBP
Retailer 4£1,898 GBP
Retailer 2£2,052 GBP
Retailer 6£2,175 GBP
Retailer 3£3,202 GBP

28 data points across 6 retailers

8 retailers£1,831 GBP to £3,202 GBP

A
Cheapest Retailer
-
£1,831 GBP
Retailer 2
-
£1,874 GBP
View
Price last confirmed 31 days ago
A
Retailer 3
-
£1,898 GBP
View
Retailer 4
-
£1,909 GBP
View
Price last confirmed 42 days ago
Retailer 5
-
£1,997 GBP
View
Price last confirmed 38 days ago
B+
Retailer 6
-
£3,202 GBP
View
Retailer 7
-
£3,917 GBP
View
Price last confirmed 32 days ago
Most Expensive
NZ Jewellers
e1559247-2f49-43c2-ba75-145ed80612e0 · Sep 27
£3,992 GBP
$5,343 USD
View
Price last confirmed 40 days ago
7 more retailers have this diamond
Prices start from £1,831 GBPSave up to £1,371 GBP

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
£1,831 GBP