CaratHunter
Plans
Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG537240878

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG537240878

Diamond specifications and retailer prices

From $301 AUD
As of November 6, 2026
Save $1,369 AUD (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,671 AUD at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG537240878 or 537240878. Listed at 16 retailers as of November 6, 2026, with prices from $301 to $1,671, a $1,369 spread on the same certified stone. Reve Diamonds lists it at $1,671. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle31.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG537240878
Dimensions7.72 × 5.99 × 3.75 mm
L/W Ratio1.29
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.72 mm5.99 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG537240878
Side View
Table 60.5%Crown 37.4°Girdle: MED-STKPavilion 31.3°Culet: NoneDepth 62.6%

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 6
Current: $770 AUD|Low: $301 AUD|High: $1,585 AUD|Avg: $755 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 7, 2026
Retailer 4$301 AUD
Retailer 2$335 AUD
Retailer 13$451 AUD
Retailer 9$552 AUD
Retailer 8$598 AUD
Retailer 5$667 AUD
Retailer 11$735 AUD
Retailer 1$770 AUD
Retailer 10$798 AUD
Retailer 3$821 AUD
Retailer 6$1,237 AUD
Retailer 12$1,324 AUD
Retailer 7$1,557 AUD

44 data points across 13 retailers

16 retailers$301 AUD to $1,671 AUD

A
Cheapest Retailer
-
$301 AUD
Final sale: no returns
A
Retailer 2
-
$335 AUD
View
B+
Retailer 3
-
$451 AUD
View
A
Retailer 4
-
$552 AUD
View
A
Retailer 5
-
$598 AUD
View
A
Retailer 6
-
$653 AUD
View
A
Retailer 7
-
$667 AUD
View
A
Retailer 8
-
$735 AUD
View
A
Retailer 9
-
$770 AUD
View
A
Retailer 10
-
$798 AUD
View
B+
Retailer 11
-
$821 AUD
View
B
Retailer 12
-
$1,156 AUD
View
B+
Retailer 13
-
$1,237 AUD
View
B
Retailer 14
-
$1,324 AUD
View
B
Retailer 15
-
$1,557 AUD
View
Most Expensive
B
Reve Diamonds
DD937C927 · Nov 6
$1,671 AUD
$1,148 USD
View
15 more retailers have this diamond
Prices start from $301 AUDSave up to $1,369 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
$301 AUD