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Round|Natural|IGI

1.51ct J SI2 Round Natural Diamond

EX • J/SI2 • IGI 635477890

Shape and cutting style on the report: Round brilliant

Certificate IGI 635477890

Diamond specifications and retailer prices

From £1,334 GBP
As of November 6, 2026
Save £1,617 GBP (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,533 GBP at NZ Jewellers · As of September 19, 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 635477890. Listed at 14 retailers as of November 4, 2026, with a 121% 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
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 635477890
Dimensions7.35 × 7.32 × 4.53 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
7.35 mm7.32 mm1.51 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 635477890
Side View
Table 56.0%Crown 33°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,334 GBP|Low: £1,334 GBP|High: £2,992 GBP|Avg: £1,979 GBP|-2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 1£1,334 GBP
Retailer 6£1,526 GBP
Retailer 3£1,938 GBP
Retailer 5£2,103 GBP
Retailer 2£2,175 GBP
Retailer 4£2,952 GBP

38 data points across 6 retailers

14 retailers£1,334 GBP to £2,952 GBP

A
Cheapest Retailer
-
£1,334 GBP
A
Retailer 2
-
£1,526 GBP
View
A
Retailer 3
-
£1,613 GBP
View
Retailer 4
-
£1,690 GBP
View
Price last confirmed 50 days ago
Retailer 5
-
£1,690 GBP
View
Price last confirmed 29 days ago
Retailer 6
-
£1,690 GBP
View
Price last confirmed 29 days ago
Retailer 7
-
£1,768 GBP
View
Price last confirmed 38 days ago
A
Retailer 8
-
£1,793 GBP
View
A
Retailer 9
-
£1,938 GBP
View
Retailer 10
-
£1,950 GBP
View
Price last confirmed 45 days ago
A
Retailer 11
-
£2,103 GBP
View
A
Retailer 12
-
£2,175 GBP
View
B+
Retailer 13
-
£2,952 GBP
View
Most Expensive
NZ Jewellers
d875dae5-36b3-424d-92ca-e1c644a90494 · Sep 19
£3,533 GBP
$4,755 USD
View
Price last confirmed 47 days ago
13 more retailers have this diamond
Prices start from £1,334 GBPSave up to £1,617 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
£1,334 GBP