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Cushion|Lab Grown|IGI

1.51ct I SI1 Cushion Lab Grown Diamond

ID • I/SI1 • IGI LG436046931

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG436046931

Diamond specifications and retailer prices

From $1,223 AUD
As of November 6, 2026
Save $5,853 AUD (83%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $7,076 AUD at MOH London · As of November 1, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436046931 or 436046931. Listed at 6 retailers as of November 1, 2026, with prices from $1,223 to $7,076, a $5,853 spread on the same certified stone. MOH London lists it at $7,076. 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436046931
Dimensions7.26 × 6.91 × 4.30 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.26 mm6.91 mm1.51 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436046931
Side View
Table 56.0%Crown 35.6°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 62.2%

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 6
Current: $7,076 AUD|Low: $1,223 AUD|High: $7,161 AUD|Avg: $3,395 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2$1,223 AUD
Retailer 5$2,126 AUD
Retailer 4$2,202 AUD
Retailer 6$2,452 AUD
Retailer 10$2,543 AUD
Retailer 9$2,716 AUD
Retailer 7$3,033 AUD
Retailer 3$3,483 AUD
Retailer 8$6,303 AUD
MOH London$7,076 AUD

10 data points across 10 retailers

6 retailers$1,223 AUD to $7,076 AUD

A
Cheapest Retailer
-
$1,223 AUD
B
Retailer 2
-
$2,126 AUD
View
Final sale: no returns
Retailer 3
-
$2,202 AUD
View
Price last confirmed 25 days ago
B
Retailer 4
-
$2,452 AUD
View
B
Retailer 5
-
$3,483 AUD
View
Most Expensive
B
MOH London
LG436046931 · Nov 1
$7,076 AUD
£3,828 GBP
View
5 more retailers have this diamond
Prices start from $1,223 AUDSave up to $5,853 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
$1,223 AUD