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1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6552492309

Certificate GIA 6552492309

Diamond specifications and retailer prices

From £1,853 GBP
As of November 6, 2026
Save £2,372 GBP (56%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £4,225 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round 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 and certified by GIA 6552492309. Listed at 9 retailers as of November 5, 2026, with prices from £1,853 to £4,225, a £2,372 spread on the same certified stone. NZ Jewellers lists it at £4,225. 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6552492309
Dimensions7.26 × 7.31 × 4.57 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Top View
7.26 mm7.31 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552492309
Side View
Table 57.0%Crown 35.5°Girdle: MediumPavilion 41°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £4,225 GBP|Low: £1,853 GBP|High: £4,431 GBP|Avg: £2,969 GBP|-4.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 2£1,853 GBP
Retailer 7£2,153 GBP
Retailer 9£2,325 GBP
Retailer 6£2,479 GBP
Retailer 4£2,531 GBP
Retailer 5£2,690 GBP
Retailer 3£3,201 GBP
Retailer 8£4,044 GBP
NZ Jewellers£4,225 GBP

27 data points across 9 retailers

9 retailers£1,853 GBP to £4,225 GBP

A
Cheapest Retailer
-
£1,853 GBP
A
Retailer 2
-
£2,153 GBP
View
A
Retailer 3
-
£2,325 GBP
View
A
Retailer 4
-
£2,479 GBP
View
A
Retailer 5
-
£2,531 GBP
View
A
Retailer 6
-
£2,690 GBP
View
B+
Retailer 7
-
£3,201 GBP
View
B
Retailer 8
-
£4,044 GBP
View
Most Expensive
B
NZ Jewellers
c02d01b1-3c8c-493e-970d-669c53f3e4b1 · Nov 5
£4,225 GBP
$5,686 USD
View
8 more retailers have this diamond
Prices start from £1,853 GBPSave up to £2,372 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 Round
£1,853 GBP