CaratHunter
Plans
Radiant|Lab Grown|IGI

1.50ct E SI1 Radiant Lab Grown Diamond

VG • E/SI1 • IGI LG539229820

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG539229820

Diamond specifications and retailer prices

From $931 AUD
$654 USD
As of October 29, 2026
Save $1,660 AUD (64%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $2,591 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.5ct lab-grown radiant diamond

This 1.5ct lab-grown radiant 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 LG539229820 or 539229820. Listed at 3 retailers as of October 29, 2026, with prices from $931 to $2,591, a $1,660 spread on the same certified stone. Brilliant Earth lists it at $2,591. 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

1.50
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.7°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG539229820
Dimensions8.86 × 5.74 × 3.75 mm
L/W Ratio1.54
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.86 mm5.74 mm1.50 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG539229820
Side View
Table 63.0%Crown 31.7°Girdle: MediumPavilion 34.3°Culet: NoneDepth 46.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $931 AUD|Low: $141 AUD|High: $1,979 AUD|Avg: $1,038 AUD|+10.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
September 23, 2026
Retailer 7$189 AUD
Retailer 9$518 AUD
Retailer 5$566 AUD
Retailer 6$854 AUD
Retailer 1$931 AUD
Retailer 3$954 AUD
Retailer 10$1,130 AUD
Retailer 11$1,256 AUD
Retailer 8$1,289 AUD
Retailer 4$1,525 AUD
Retailer 2$1,979 AUD

61 data points across 11 retailers

3 retailers$931 AUD to $2,591 AUD

B+
Cheapest Retailer
-
$931 AUD
$654 USD
B
Retailer 2
-
$998 AUD
£552 GBP
View
Most Expensive
C
Brilliant Earth
7359194Y · Oct 29
$2,591 AUD
$1,820 USD
View
2 more retailers have this diamond
Prices start from $931 AUDSave up to $1,660 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.

B+
1.50ct Radiant
$931 AUD