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Cushion|Lab Grown|GIA

3.09ct H SI1 Cushion Lab Grown Diamond

EX • H/SI1 • GIA 6425401098

Certificate GIA 6425401098

Diamond specifications and retailer prices

From £882 GBP
As of November 5, 2026
Save £1,925 GBP (69%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,807 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 3.09ct lab-grown cushion diamond

This 3.09ct lab-grown cushion sits in the three to five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6425401098. Listed at 10 retailers as of November 5, 2026, with prices from £882 to £2,807, a £1,925 spread on the same certified stone. MOH London lists it at £2,807. 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

3.09
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 6425401098
Dimensions8.61 × 8.42 × 5.57 mm
L/W Ratio1.02
Top View
8.61 mm8.42 mm3.09 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6425401098
Side View
Table 63.0%CrownGirdle: STK-NULPavilionCulet: NoneDepth 66.2%

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 5
Current: £2,807 GBP|Low: £751 GBP|High: £2,852 GBP|Avg: £1,375 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8£751 GBP
Retailer 5£882 GBP
Retailer 9£945 GBP
Retailer 10£1,100 GBP
Retailer 2£1,159 GBP
Retailer 7£1,207 GBP
Retailer 4£1,266 GBP
Retailer 3£1,568 GBP
Retailer 6£1,860 GBP
MOH London£2,807 GBP

30 data points across 10 retailers

10 retailers£882 GBP to £2,807 GBP

Retailer 1
-
£751 GBP
Price last confirmed 25 days ago
A
Retailer 2
-
£882 GBP
View
A
Retailer 3
-
£945 GBP
View
Final sale: no returns
B+
Retailer 4
-
£1,100 GBP
View
B+
Retailer 5
-
£1,159 GBP
View
B+
Retailer 6
-
£1,207 GBP
View
B+
Retailer 7
-
£1,266 GBP
View
B+
Retailer 8
-
£1,568 GBP
View
B
Retailer 9
-
£1,860 GBP
View
Most Expensive
B
MOH London
6425401098 · Nov 5
£2,807 GBP
View
9 more retailers have this diamond
Prices start from £882 GBPSave up to £1,925 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
3.09ct Cushion
£882 GBP