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Round|Lab Grown|IGI

1.50ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG400945003

Shape and cutting style on the report: Round brilliant

Certificate IGI LG400945003

Diamond specifications and retailer prices

From $1,661 NZD
As of November 5, 2026
Save $3,757 NZD (69%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $5,419 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.5ct lab-grown round diamond

This 1.5ct lab-grown round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG400945003 or 400945003. Listed at 6 retailers as of November 5, 2026, with prices from $1,661 to $5,419, a $3,757 spread on the same certified stone. NZ Jewellers lists it at $5,419. 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

1.50
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle31.8°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG400945003
Dimensions7.50 × 7.55 × 4.35 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
7.50 mm7.55 mm1.50 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG400945003
Side View
Table 61.0%Crown 31.8°Girdle: MediumPavilion 40.2°Culet: NoneDepth 58.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: $2,241 NZD|Low: $1,596 NZD|High: $7,978 NZD|Avg: $2,220 NZD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
October 28, 2026
Retailer 2$1,661 NZD
Retailer 3$1,927 NZD
Retailer 4$1,927 NZD
Retailer 1$2,241 NZD

6 data points across 4 retailers

6 retailers$1,661 NZD to $5,419 NZD

A
Cheapest Retailer
-
$1,661 NZD
A
Retailer 2
-
$1,807 NZD
View
A
Retailer 3
-
$1,927 NZD
View
Retailer 4
-
$1,927 NZD
View
Price last confirmed 25 days ago
A
Retailer 5
-
$2,241 NZD
View
Most Expensive
B
NZ Jewellers
06f09fdf-abae-46c9-89b2-fb98430fe792 · Nov 5
$5,419 NZD
$3,046 USD
View
5 more retailers have this diamond
Prices start from $1,661 NZDSave up to $3,757 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.

A
1.50ct Round
$1,661 NZD