CaratHunter
Plans
Cushion|Lab Grown|IGI

1.09ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG604304627

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG604304627

Diamond specifications and retailer prices

From $275 USD
£217 GBP
As of November 2, 2026
Save $1,096 USD (80%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,372 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.09ct lab-grown cushion diamond

This 1.09ct lab-grown cushion sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG604304627 or 604304627. Listed at 9 retailers as of October 29, 2026, with prices from $275 to $1,372, a $1,096 spread on the same certified stone. MOH London lists it at $1,372. 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

1.09
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG604304627
Dimensions7.03 × 5.54 × 3.68 mm
L/W Ratio1.27
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.03 mm5.54 mm1.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG604304627
Side View
Table 66.0%Crown 30.5°Girdle: MED-THKPavilion 40.1°Culet: NoneDepth 66.4%

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 2
Current: $1,372 USD|Low: $213 USD|High: $1,379 USD|Avg: $467 USD|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6$213 USD
Retailer 2$275 USD
Retailer 3$305 USD
Retailer 8$308 USD
Retailer 4$310 USD
Retailer 5$334 USD
Retailer 7$488 USD
Retailer 9$600 USD
MOH London$1,372 USD

36 data points across 9 retailers

9 retailers$275 USD to $1,372 USD

Retailer 1
-
$213 USD
£168 GBP
Price last confirmed 16 days ago
A
Retailer 2
-
$275 USD
£217 GBP
View
A
Retailer 3
-
$305 USD
€290 EUR
View
B+
Retailer 4
-
$308 USD
View
A
Retailer 5
-
$310 USD
£244 GBP
View
A
Retailer 6
-
$334 USD
View
B+
Retailer 7
-
$488 USD
View
B
Retailer 8
-
$600 USD
View
Most Expensive
B
MOH London
LG604304627 · Oct 29
$1,372 USD
£1,080 GBP
View
8 more retailers have this diamond
Prices start from $275 USDSave up to $1,096 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
1.09ct Cushion
$275 USD