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Round|Natural|IGI

1.25ct M SI2 Round Natural Diamond

EX • M/SI2 • IGI 750557197

Shape and cutting style on the report: Round brilliant

Certificate IGI 750557197

Diamond specifications and retailer prices

From £941 GBP
As of November 5, 2026
Save £507 GBP (35%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,953 GBP at NZ Jewellers · As of September 10, 2026
View at NZ Jewellers

About this 1.25ct natural round diamond

This 1.25ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 750557197. Listed at 8 retailers as of November 1, 2026, with a 54% 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

1.25
Carat
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
Crown angle32.7°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 750557197
Dimensions7.01 × 7.09 × 4.23 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
Additional clouds not shown.
Top View
7.01 mm7.09 mm1.25 ctM / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateIGI 750557197
Side View
Table 57.0%Crown 32.7°Girdle: MediumPavilion 41.2°Culet: NoneDepth 59.9%

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 5
Current: £1,117 GBP|Low: £787 GBP|High: £1,613 GBP|Avg: £1,129 GBP|-9.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5£787 GBP
Retailer 3£941 GBP
Retailer 4£1,074 GBP
Retailer 6£1,097 GBP
Retailer 1£1,117 GBP
Retailer 7£1,155 GBP
Retailer 8£1,305 GBP
Retailer 2£1,442 GBP

35 data points across 8 retailers

8 retailers£941 GBP to £1,447 GBP

A
Cheapest Retailer
-
£941 GBP
B+
Retailer 2
-
£1,074 GBP
View
Retailer 3
-
£1,097 GBP
View
Price last confirmed 56 days ago
A
Retailer 4
-
£1,117 GBP
View
Retailer 5
-
£1,265 GBP
View
Price last confirmed 60 days ago
B+
Retailer 6
-
£1,442 GBP
View
B+
Retailer 7
-
£1,447 GBP
View
Most Expensive
NZ Jewellers
132db26e-3e96-4417-a7d9-a8c7ac8b1782 · Sep 10
£2,953 GBP
$3,974 USD
View
Price last confirmed 56 days ago
7 more retailers have this diamond
Prices start from £941 GBPSave up to £507 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
1.25ct Round
£941 GBP