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Radiant|Lab Grown|IGI

1.50ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG512225938

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

Certificate IGI LG512225938

Diamond specifications and retailer prices

From $2,940 NZD
As of November 6, 2026
Save $2,511 NZD (46%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,503 NZD at NZ Jewellers · As of November 6, 2026
View at NZ Jewellers

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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512225938 or 512225938. Listed at 13 retailers as of November 6, 2026, with a 85% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.4°
Pavilion angle35°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512225938
Dimensions7.52 × 5.83 × 3.95 mm
L/W Ratio1.29
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
7.52 mm5.83 mm1.50 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512225938
Side View
Table 66.0%Crown 42.4°Girdle: STK-THKPavilion 35°Culet: NoneDepth 67.8%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $4,869 NZD|Low: $2,872 NZD|High: $10,041 NZD|Avg: $5,290 NZD|-2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 6$2,940 NZD
Retailer 5$2,991 NZD
Retailer 9$3,348 NZD
Retailer 7$3,469 NZD
Retailer 10$3,779 NZD
Retailer 1$4,869 NZD
Retailer 8$5,451 NZD
Retailer 4$5,982 NZD
Retailer 2$9,541 NZD
Retailer 3$9,882 NZD

45 data points across 10 retailers

13 retailers$2,940 NZD to $5,451 NZD

B
Cheapest Retailer
-
$2,940 NZD
B
Retailer 2
-
$2,991 NZD
View
B
Retailer 3
-
$3,254 NZD
View
B
Retailer 4
-
$3,348 NZD
View
Final sale: no returns
Retailer 5
-
$3,469 NZD
View
Price last confirmed 26 days ago
B
Retailer 6
-
$3,469 NZD
View
B
Retailer 7
-
$3,779 NZD
View
B
Retailer 8
-
$4,869 NZD
View
B
Retailer 9
-
$5,451 NZD
View
Retailer 10
-
$5,982 NZD
View
Price under review
Most Expensive
NZ Jewellers
58615348-14eb-4e0a-924d-935e33d6be81 · Nov 6
$6,503 NZD
$3,605 USD
View
Price under review
10 more retailers have this diamond
Prices start from $2,940 NZDSave up to $2,511 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
$2,940 NZD