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Round|Natural|GIA

1.28ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 7453705337

Certificate GIA 7453705337

Diamond specifications and retailer prices

From £1,297 GBP
As of November 6, 2026
Save £2,081 GBP (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,378 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.28ct natural round diamond

This 1.28ct 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 7453705337. Listed at 7 retailers as of November 5, 2026, with prices from £1,297 to £3,378, a £2,081 spread on the same certified stone. NZ Jewellers lists it at £3,378. 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

1.28
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7453705337
Dimensions6.95 × 6.90 × 4.30 mm
L/W Ratio1.01
Top View
6.95 mm6.90 mm1.28 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7453705337
Side View
Table 57.0%CrownGirdlePavilionCulet: NoneDepth 62.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £3,378 GBP|Low: £1,297 GBP|High: £3,378 GBP|Avg: £1,943 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 3£1,297 GBP
Retailer 6£1,464 GBP
Retailer 7£1,464 GBP
Retailer 4£1,531 GBP
Retailer 10£1,664 GBP
Retailer 5£1,690 GBP
Retailer 2£2,002 GBP
Retailer 9£2,343 GBP
Retailer 8£2,365 GBP
NZ Jewellers£3,378 GBP

27 data points across 10 retailers

7 retailers£1,297 GBP to £3,378 GBP

A
Cheapest Retailer
-
£1,297 GBP
B+
Retailer 2
-
£1,464 GBP
View
B+
Retailer 3
-
£1,531 GBP
View
B
Retailer 4
-
£1,690 GBP
View
B
Retailer 5
-
£2,002 GBP
View
B
Retailer 6
-
£2,343 GBP
View
Most Expensive
C
NZ Jewellers
5e02116b-a3d5-461c-a2b6-f88d2a221da3 · Nov 5
£3,378 GBP
$4,547 USD
View
6 more retailers have this diamond
Prices start from £1,297 GBPSave up to £2,081 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
1.28ct Round
£1,297 GBP