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1.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 2428630036

Certificate GIA 2428630036

Diamond specifications and retailer prices

From £2,422 GBP
As of November 5, 2026
Save £2,927 GBP (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £5,349 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 M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2428630036. Listed at 11 retailers as of November 5, 2026, with prices from £2,422 to £5,349, a £2,927 spread on the same certified stone. NZ Jewellers lists it at £5,349. 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
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2428630036
Dimensions7.29 × 7.32 × 4.58 mm
L/W Ratio1.00
Top View
7.29 mm7.32 mm1.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2428630036
Side View
Table 57.0%Crown 36.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £5,349 GBP|Low: £2,422 GBP|High: £5,349 GBP|Avg: £3,210 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 14£2,422 GBP
Retailer 3£2,488 GBP
Retailer 5£2,664 GBP
Retailer 12£2,702 GBP
Retailer 6£3,063 GBP
Retailer 8£3,070 GBP
Retailer 9£3,070 GBP
Retailer 10£3,070 GBP
Retailer 13£3,179 GBP
Retailer 7£3,446 GBP
Retailer 11£3,543 GBP
Retailer 4£3,653 GBP
Retailer 2£3,955 GBP
NZ Jewellers£5,349 GBP

34 data points across 14 retailers

11 retailers£2,422 GBP to £5,349 GBP

B+
Cheapest Retailer
-
£2,422 GBP
B
Retailer 2
-
£2,664 GBP
View
B
Retailer 3
-
£2,702 GBP
View
B
Retailer 4
-
£3,070 GBP
View
Retailer 5
-
£3,070 GBP
View
Price last confirmed 8 days ago
B
Retailer 6
-
£3,070 GBP
View
B
Retailer 7
-
£3,179 GBP
View
B
Retailer 8
-
£3,446 GBP
View
B
Retailer 9
-
£3,543 GBP
View
B
Retailer 10
-
£3,955 GBP
View
Most Expensive
C
NZ Jewellers
78ce4ef3-6b18-4628-9613-46d7894a51ad · Nov 5
£5,349 GBP
$7,199 USD
View
10 more retailers have this diamond
Prices start from £2,422 GBPSave up to £2,927 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.

B+
1.51ct Round
£2,422 GBP