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Round|Natural|GIA

1.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 6422890913

Certificate GIA 6422890913

Diamond specifications and retailer prices

From £2,650 GBP
As of November 5, 2026
Save £2,699 GBP (50%) 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 6422890913. Listed at 11 retailers as of November 5, 2026, with prices from £2,650 to £5,349, a £2,699 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
FluorescenceNone
Crown angle33°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6422890913
Dimensions7.36 × 7.40 × 4.56 mm
L/W Ratio1.01
Top View
7.36 mm7.40 mm1.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6422890913
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.7%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: £5,349 GBP|Low: £2,650 GBP|High: £5,349 GBP|Avg: £3,430 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 6£2,650 GBP
Retailer 10£2,719 GBP
Retailer 5£3,070 GBP
Retailer 7£3,070 GBP
Retailer 9£3,070 GBP
Retailer 3£3,179 GBP
Retailer 4£3,451 GBP
Retailer 8£3,543 GBP
Retailer 11£3,653 GBP
Retailer 2£3,955 GBP
NZ Jewellers£5,349 GBP

38 data points across 11 retailers

11 retailers£2,650 GBP to £5,349 GBP

B+
Cheapest Retailer
-
£2,650 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
-
£3,451 GBP
View
B
Retailer 9
-
£3,543 GBP
View
B
Retailer 10
-
£3,955 GBP
View
Most Expensive
C
NZ Jewellers
d38079af-364e-4d5f-9d9b-d33c6d7af822 · Nov 5
£5,349 GBP
$7,199 USD
View
10 more retailers have this diamond
Prices start from £2,650 GBPSave up to £2,699 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
£2,650 GBP