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Round|Natural|GIA

1.31ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 7502345420

Certificate GIA 7502345420

Diamond specifications and retailer prices

From £1,232 GBP
As of November 5, 2026
Save £2,066 GBP (63%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,297 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.31ct natural round diamond

This 1.31ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7502345420. Listed at 11 retailers as of November 5, 2026, with prices from £1,232 to £3,297, a £2,066 spread on the same certified stone. NZ Jewellers lists it at £3,297. 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

1.31
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 7502345420
Dimensions6.94 × 6.99 × 4.34 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
6.94 mm6.99 mm1.31 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7502345420
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.3%

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: £3,297 GBP|Low: £1,232 GBP|High: £3,358 GBP|Avg: £1,685 GBP|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 10£1,232 GBP
Retailer 4£1,260 GBP
Retailer 5£1,352 GBP
Retailer 9£1,352 GBP
Retailer 7£1,393 GBP
Retailer 6£1,415 GBP
Retailer 8£1,453 GBP
Retailer 2£1,649 GBP
Retailer 11£1,849 GBP
Retailer 3£1,936 GBP
Retailer 12£2,268 GBP
NZ Jewellers£3,297 GBP

15 data points across 12 retailers

11 retailers£1,232 GBP to £3,297 GBP

A
Cheapest Retailer
-
£1,232 GBP
A
Retailer 2
-
£1,352 GBP
View
Retailer 3
-
£1,352 GBP
View
Price last confirmed 8 days ago
Retailer 4
-
£1,377 GBP
View
Price last confirmed 60 days ago
A
Retailer 5
-
£1,393 GBP
View
B+
Retailer 6
-
£1,415 GBP
View
B+
Retailer 7
-
£1,453 GBP
View
Retailer 8
-
£1,560 GBP
View
Price last confirmed 68 days ago
B+
Retailer 9
-
£1,649 GBP
View
Retailer 10
-
£3,297 GBP
View
Price last confirmed 66 days ago
Most Expensive
C
NZ Jewellers
e160ed7e-f912-4ae8-aaa7-d6b85ca2b835 · Nov 5
£3,297 GBP
$4,438 USD
View
10 more retailers have this diamond
Prices start from £1,232 GBPSave up to £2,066 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
1.31ct Round
£1,232 GBP