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Cushion|Lab Grown|IGI

1.55ct E SI1 Cushion Lab Grown Diamond

VG • E/SI1 • IGI LG825630871

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG825630871

Diamond specifications and retailer prices

From $306 AUD
$215 USD
As of October 30, 2026
Save $1,356 AUD (82%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,662 AUD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.55ct lab-grown cushion diamond

This 1.55ct 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 very-good cut grade and certified by IGI LG825630871 or 825630871. Listed at 8 retailers as of October 30, 2026, with prices from $306 to $1,662, a $1,356 spread on the same certified stone. Reve Diamonds lists it at $1,662. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.55
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.1°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825630871
Dimensions7.51 × 5.99 × 4.14 mm
L/W Ratio1.25
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.51 mm5.99 mm1.55 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG825630871
Side View
Table 67.0%Crown 35.1°Girdle: STK-VTKPavilion 41.1°Culet: NoneDepth 69.1%

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: Oct 30
Current: $615 AUD|Low: $306 AUD|High: $1,662 AUD|Avg: $589 AUD|+2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Reve Diamonds
October 30, 2026
Retailer 6$306 AUD
Retailer 4$455 AUD
Retailer 2$572 AUD
Retailer 1$615 AUD
Retailer 5$672 AUD
Retailer 3$1,165 AUD
Reve Diamonds$1,662 AUD

20 data points across 7 retailers

8 retailers$306 AUD to $1,662 AUD

A
Cheapest Retailer
-
$306 AUD
$215 USD
Final sale: no returns
B+
Retailer 2
-
$455 AUD
$320 USD
View
B+
Retailer 3
-
$572 AUD
€383 EUR
View
B+
Retailer 4
-
$615 AUD
£340 GBP
View
B+
Retailer 5
-
$672 AUD
$472 USD
View
B
Retailer 6
-
$1,165 AUD
$818 USD
View
B
Retailer 7
-
$1,566 AUD
$1,100 USD
View
Most Expensive
B
Reve Diamonds
69302FC56 · Oct 30
$1,662 AUD
$1,168 USD
View
7 more retailers have this diamond
Prices start from $306 AUDSave up to $1,356 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
1.55ct Cushion
$306 AUD