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 $1,164 NZD
$654 USD
As of October 29, 2026
Save $2,076 NZD (64%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $3,241 NZD 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 $1,164 to $3,241, a $2,076 spread on the same certified stone. Brilliant Earth lists it at $3,241. 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: $1,164 NZD|Low: $176 NZD|High: $2,475 NZD|Avg: $1,299 NZD|+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$237 NZD
Retailer 9$648 NZD
Retailer 5$708 NZD
Retailer 6$1,068 NZD
Retailer 1$1,164 NZD
Retailer 3$1,194 NZD
Retailer 10$1,414 NZD
Retailer 11$1,571 NZD
Retailer 8$1,612 NZD
Retailer 4$1,908 NZD
Retailer 2$2,475 NZD

61 data points across 11 retailers

3 retailers$1,164 NZD to $3,241 NZD

B+
Cheapest Retailer
-
$1,164 NZD
$654 USD
B
Retailer 2
-
$1,248 NZD
£552 GBP
View
Most Expensive
C
Brilliant Earth
7359194Y · Oct 29
$3,241 NZD
$1,820 USD
View
2 more retailers have this diamond
Prices start from $1,164 NZDSave up to $2,076 NZD

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
$1,164 NZD