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Cushion|Lab Grown|IGI

3.55ct F SI1 Cushion Lab Grown Diamond

EX • F/SI1 • IGI LG689555131

Shape and cutting style on the report: Rectangular cushion mixed cut

Certificate IGI LG689555131

Diamond specifications and retailer prices

From $771 AUD
$540 USD
As of November 1, 2026
Save $2,801 AUD (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,572 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 3.55ct lab-grown cushion diamond

This 3.55ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG689555131 or 689555131. Listed at 12 retailers as of November 1, 2026, with prices from $771 to $3,572, a $2,801 spread on the same certified stone. MOH London lists it at $3,572. 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

3.55
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.4°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689555131
Dimensions11.47 × 7.29 × 4.26 mm
L/W Ratio1.57
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.47 mm7.29 mm3.55 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689555131
Side View
Table 66.0%Crown 30.4°Girdle: MED-STKPavilion 35.8°Culet: LargeDepth 58.4%

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 1
Current: $3,572 AUD|Low: $771 AUD|High: $3,613 AUD|Avg: $1,872 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9$771 AUD
Retailer 7$1,056 AUD
Retailer 5$1,149 AUD
Retailer 6$1,288 AUD
Retailer 11$1,306 AUD
Retailer 4$1,421 AUD
Retailer 3$1,899 AUD
Retailer 2$2,005 AUD
Retailer 10$2,714 AUD
Retailer 8$2,994 AUD
MOH London$3,572 AUD

38 data points across 11 retailers

12 retailers$771 AUD to $3,572 AUD

A
Cheapest Retailer
-
$771 AUD
$540 USD
Final sale: no returns
A
Retailer 2
-
$1,056 AUD
$740 USD
View
B+
Retailer 3
-
$1,149 AUD
$805 USD
View
A
Retailer 4
-
$1,288 AUD
€860 EUR
View
A
Retailer 5
-
$1,306 AUD
$915 USD
View
A
Retailer 6
-
$1,421 AUD
£784 GBP
View
B+
Retailer 7
-
$1,899 AUD
$1,331 USD
View
B+
Retailer 8
-
$2,005 AUD
$1,405 USD
View
B
Retailer 9
-
$2,714 AUD
SGD 2,570 SGD
View
B
Retailer 10
-
$2,790 AUD
$1,955 USD
View
B+
Retailer 11
-
$2,994 AUD
$2,098 USD
View
Most Expensive
B
MOH London
LG689555131 · Nov 1
$3,572 AUD
£1,971 GBP
View
11 more retailers have this diamond
Prices start from $771 AUDSave up to $2,801 AUD

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
3.55ct Cushion
$771 AUD