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Radiant|Lab Grown|IGI

1.51ct F SI1 Radiant Lab Grown Diamond

VG • F/SI1 • IGI LG620417160

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

Certificate IGI LG620417160

Diamond specifications and retailer prices

From $330 NZD
As of November 6, 2026
Save $1,578 NZD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,908 NZD at MOH London · As of November 5, 2026
View at MOH London

About this 1.51ct lab-grown radiant diamond

This 1.51ct 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 very-good cut grade and certified by IGI LG620417160 or 620417160. Listed at 16 retailers as of November 5, 2026, with prices from $330 to $1,908, a $1,578 spread on the same certified stone. MOH London lists it at $1,908. 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

1.51
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.8°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620417160
Dimensions7.92 × 5.65 × 3.94 mm
L/W Ratio1.40
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
7.92 mm5.65 mm1.51 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG620417160
Side View
Table 63.0%Crown 38.8°Girdle: STK-THKPavilion 36°Culet: NoneDepth 69.7%

Caratlytics Score

How it works →
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: $1,908 NZD|Low: $317 NZD|High: $1,947 NZD|Avg: $956 NZD|-1.4%
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
November 7, 2026
Retailer 3$330 NZD
Retailer 7$370 NZD
Retailer 10$382 NZD
Retailer 5$409 NZD
Retailer 6$415 NZD
Retailer 4$720 NZD
Retailer 2$729 NZD
Retailer 8$754 NZD
Retailer 14$824 NZD
Retailer 15$877 NZD
Retailer 9$1,317 NZD
Retailer 11$1,317 NZD
Retailer 13$1,391 NZD
Retailer 12$1,840 NZD
MOH London$1,908 NZD

45 data points across 15 retailers

16 retailers$330 NZD to $1,908 NZD

A
Cheapest Retailer
-
$330 NZD
A
Retailer 2
-
$370 NZD
View
Final sale: no returns
A
Retailer 3
-
$382 NZD
View
A
Retailer 4
-
$409 NZD
View
Retailer 5
-
$415 NZD
View
Price last confirmed 13 days ago
B+
Retailer 6
-
$720 NZD
View
B+
Retailer 7
-
$729 NZD
View
B+
Retailer 8
-
$754 NZD
View
B+
Retailer 9
-
$824 NZD
View
B+
Retailer 10
-
$877 NZD
View
B+
Retailer 11
-
$1,317 NZD
View
B
Retailer 12
-
$1,317 NZD
View
B
Retailer 13
-
$1,366 NZD
View
B
Retailer 14
-
$1,391 NZD
View
B
Retailer 15
-
$1,840 NZD
View
Most Expensive
B
MOH London
LG620417160 · Nov 5
$1,908 NZD
£833 GBP
View
15 more retailers have this diamond
Prices start from $330 NZDSave up to $1,578 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
1.51ct Radiant
$330 NZD