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Round|Natural|IGI

1.53ct M SI2 Round Natural Diamond

EX • M/SI2 • IGI 539242735

Shape and cutting style on the report: Round brilliant

Certificate IGI 539242735

Diamond specifications and retailer prices

From £487 GBP
As of November 5, 2026
Save £528 GBP (52%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,875 GBP at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.53ct natural round diamond

This 1.53ct 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 IGI 539242735. Listed at 8 retailers as of November 5, 2026, with a 109% 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

1.53
Carat
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 539242735
Dimensions7.35 × 7.40 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.35 mm7.40 mm1.53 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 539242735
Side View
Table 57.5%Crown 35°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
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 5
Current: £1,015 GBP|Low: £487 GBP|High: £1,034 GBP|Avg: £770 GBP|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2£487 GBP
Retailer 4£769 GBP
Retailer 3£799 GBP
Retailer 5£837 GBP
Retailer 1£1,015 GBP

45 data points across 5 retailers

8 retailers£487 GBP to £1,015 GBP

A
Cheapest Retailer
-
£487 GBP
B+
Retailer 2
-
£751 GBP
View
Retailer 3
-
£769 GBP
View
Price last confirmed 49 days ago
B+
Retailer 4
-
£799 GBP
View
B+
Retailer 5
-
£868 GBP
View
Retailer 6
-
£887 GBP
View
Price last confirmed 45 days ago
A
Retailer 7
-
£1,015 GBP
View
Most Expensive
NZ Jewellers
2aa3ab5a-fd6b-4078-9b34-e02dc9fe97c6 · Sep 19
£1,875 GBP
$2,524 USD
View
Price last confirmed 47 days ago
7 more retailers have this diamond
Prices start from £487 GBPSave up to £528 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
1.53ct Round
£487 GBP