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 $1,180 USD
As of November 2, 2026
Save $2,607 USD (69%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $3,787 USD at MOH London · As of October 29, 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 October 29, 2026, with prices from $1,180 to $3,787, a $2,607 spread on the same certified stone. MOH London lists it at $3,787. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $3,787 USD|Low: $1,005 USD|High: $3,818 USD|Avg: $1,854 USD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7$1,005 USD
Retailer 4$1,180 USD
Retailer 8$1,265 USD
Retailer 9$1,472 USD
Retailer 3$1,556 USD
Retailer 6$1,615 USD
Retailer 2$2,099 USD
Retailer 5$2,490 USD
MOH London$3,787 USD

25 data points across 9 retailers

10 retailers$1,180 USD to $3,787 USD

Retailer 1
-
$1,005 USD
Price last confirmed 21 days ago
A
Retailer 2
-
$1,180 USD
View
A
Retailer 3
-
$1,265 USD
View
Final sale: no returns
A
Retailer 4
-
$1,472 USD
View
B+
Retailer 5
-
$1,556 USD
€1,482 EUR
View
B+
Retailer 6
-
$1,615 USD
View
Retailer 7
-
$1,695 USD
View
B+
Retailer 8
-
$2,099 USD
View
B+
Retailer 9
-
$2,490 USD
View
Most Expensive
B
MOH London
6425401098 · Oct 29
$3,787 USD
£2,982 GBP
View
9 more retailers have this diamond
Prices start from $1,180 USDSave up to $2,607 USD

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
$1,180 USD