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Round|Lab Grown|IGI

1.28ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG696546266

Certificate IGI LG696546266

Diamond specifications and retailer prices

From £624 GBP
As of November 4, 2026
Save £416 GBP (40%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,040 GBP at Jared · As of November 4, 2026
View at Jared

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG696546266 or 696546266. Listed at 3 retailers as of November 4, 2026, with prices from £624 to £1,040, a £416 spread on the same certified stone. Jared lists it at £1,040. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG696546266
Dimensions6.98 × 7.03 mm
L/W Ratio1.01
Top View
6.98 mm7.03 mm1.28 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG696546266
Side View
Table 58.0%CrownGirdle: MediumPavilionCulet: NoneDepth 60.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 4
Current: £1,040 GBP|Low: £624 GBP|High: £1,040 GBP|Avg: £823 GBP
Jared
Retailer 2
Retailer 3
April 27, 2026
Retailer 2£624 GBP
Retailer 3£624 GBP
Jared£1,040 GBP

7 data points across 3 retailers

3 retailers£624 GBP to £1,040 GBP

B
Cheapest Retailer
-
£624 GBP
B
Retailer 2
-
£624 GBP
View
Most Expensive
B
Jared
155580016 · Nov 4
£1,040 GBP
$1,400 USD
View
2 more retailers have this diamond
Prices start from £624 GBPSave up to £416 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.

B
1.28ct Round
£624 GBP