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Oval|Natural|GIA

1.28ct M SI1 Oval Natural Diamond

ID • M/SI1 • GIA 6445428290

Certificate GIA 6445428290

Diamond specifications and retailer prices

From £1,004 GBP
As of November 6, 2026
Save £2,311 GBP (70%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,315 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.28ct natural oval diamond

This 1.28ct natural oval 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 stated by the retailer rather than the lab and certified by GIA 6445428290. Listed at 12 retailers as of November 5, 2026, with prices from £1,004 to £3,315, a £2,311 spread on the same certified stone. NZ Jewellers lists it at £3,315. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6445428290
Dimensions8.30 × 5.71 × 3.95 mm
L/W Ratio1.45
Top View
8.30 mm5.71 mm1.28 ctM / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6445428290
Side View
Table 56.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 69.2%

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: £3,315 GBP|Low: £994 GBP|High: £3,361 GBP|Avg: £1,572 GBP|-1.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 7£1,004 GBP
Retailer 3£1,241 GBP
Retailer 5£1,333 GBP
Retailer 8£1,359 GBP
Retailer 11£1,359 GBP
Retailer 4£1,378 GBP
Retailer 9£1,401 GBP
Retailer 13£1,422 GBP
Retailer 10£1,461 GBP
Retailer 12£1,568 GBP
Retailer 6£1,659 GBP
Retailer 2£1,845 GBP
NZ Jewellers£3,315 GBP

32 data points across 13 retailers

12 retailers£1,004 GBP to £3,315 GBP

A
Cheapest Retailer
-
£1,004 GBP
A
Retailer 2
-
£1,241 GBP
View
Retailer 3
-
£1,359 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£1,359 GBP
View
B+
Retailer 5
-
£1,378 GBP
View
B+
Retailer 6
-
£1,401 GBP
View
B+
Retailer 7
-
£1,422 GBP
View
B+
Retailer 8
-
£1,461 GBP
View
B+
Retailer 9
-
£1,568 GBP
View
B+
Retailer 10
-
£1,659 GBP
View
B
Retailer 11
-
£1,845 GBP
View
Most Expensive
B
NZ Jewellers
0aa3f585-1d3d-4c76-8aa9-2cace6c3caa2 · Nov 5
£3,315 GBP
$4,437 USD
View
11 more retailers have this diamond
Prices start from £1,004 GBPSave up to £2,311 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 Oval
£1,004 GBP