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Radiant|Lab Grown|IGI

1.50ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG778660444

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

Certificate IGI LG778660444

Diamond specifications and retailer prices

From $345 NZD
As of November 6, 2026
Save $1,649 NZD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,993 NZD at MOH London · As of November 5, 2026
View at MOH London

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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778660444 or 778660444. Listed at 16 retailers as of November 5, 2026, with prices from $345 to $1,993, a $1,649 spread on the same certified stone. MOH London lists it at $1,993. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.9°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778660444
Dimensions8.24 × 5.72 × 3.74 mm
L/W Ratio1.44
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.24 mm5.72 mm1.50 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778660444
Side View
Table 65.0%Crown 38.9°Girdle: Slightly ThickPavilion 33.7°Culet: NoneDepth 65.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,993 NZD|Low: $336 NZD|High: $2,046 NZD|Avg: $1,025 NZD|-2.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 3$345 NZD
Retailer 16$384 NZD
Retailer 12$400 NZD
Retailer 7$428 NZD
Retailer 8$429 NZD
Retailer 4$749 NZD
Retailer 2$768 NZD
Retailer 14$846 NZD
Retailer 15$1,026 NZD
Retailer 11$1,111 NZD
Retailer 10$1,299 NZD
Retailer 13$1,375 NZD
Retailer 5$1,394 NZD
Retailer 6$1,470 NZD
Retailer 9$1,858 NZD
MOH London$1,993 NZD

34 data points across 16 retailers

16 retailers$345 NZD to $1,993 NZD

A
Cheapest Retailer
-
$345 NZD
A
Retailer 2
-
$384 NZD
View
Final sale: no returns
A
Retailer 3
-
$400 NZD
View
A
Retailer 4
-
$428 NZD
View
Retailer 5
-
$429 NZD
View
Price last confirmed 13 days ago
B+
Retailer 6
-
$749 NZD
View
A
Retailer 7
-
$768 NZD
View
A
Retailer 8
-
$846 NZD
View
A
Retailer 9
-
$1,026 NZD
View
B+
Retailer 10
-
$1,111 NZD
View
B+
Retailer 11
-
$1,299 NZD
View
B+
Retailer 12
-
$1,375 NZD
View
B+
Retailer 13
-
$1,394 NZD
View
B+
Retailer 14
-
$1,470 NZD
View
B
Retailer 15
-
$1,858 NZD
View
Most Expensive
B
MOH London
LG778660444 · Nov 5
$1,993 NZD
£870 GBP
View
15 more retailers have this diamond
Prices start from $345 NZDSave up to $1,649 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 Radiant
$345 NZD