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Cushion|Lab Grown|IGI

1.51ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG792656934

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG792656934

Diamond specifications and retailer prices

From $598 AUD
€399 EUR
As of November 2, 2026
Save $1,048 AUD (64%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,645 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG792656934 or 792656934. Listed at 7 retailers as of November 2, 2026, with prices from $598 to $1,645, a $1,048 spread on the same certified stone. MOH London lists it at $1,645. 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

1.51
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.9°
Pavilion angle36.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG792656934
Dimensions6.71 × 6.55 × 4.13 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.71 mm6.55 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG792656934
Side View
Table 65.0%Crown 35.9°Girdle: STK-THKPavilion 36.5°Culet: NoneDepth 63.1%

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: $1,645 AUD|Low: $569 AUD|High: $1,723 AUD|Avg: $836 AUD|+1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 2$598 AUD
Retailer 5$611 AUD
Retailer 3$645 AUD
Retailer 4$659 AUD
Retailer 6$711 AUD
MOH London$1,645 AUD

41 data points across 6 retailers

7 retailers$598 AUD to $1,645 AUD

A
Cheapest Retailer
-
$598 AUD
€399 EUR
B+
Retailer 2
-
$611 AUD
$428 USD
View
A
Retailer 3
-
$645 AUD
£356 GBP
View
A
Retailer 4
-
$659 AUD
$462 USD
View
A
Retailer 5
-
$711 AUD
$498 USD
View
B+
Retailer 6
-
$1,220 AUD
$855 USD
View
Most Expensive
B
MOH London
LG792656934 · Nov 2
$1,645 AUD
£908 GBP
View
6 more retailers have this diamond
Prices start from $598 AUDSave up to $1,048 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
1.51ct Cushion
$598 AUD