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Radiant|Lab Grown|IGI

3.51ct D SI1 Radiant Lab Grown Diamond

VG • D/SI1 • IGI LG660405323

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

Certificate IGI LG660405323

Diamond specifications and retailer prices

From $848 NZD
$478 USD
As of October 30, 2026
Save $3,039 NZD (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,887 NZD at MOH London · As of October 29, 2026
View at MOH London

About this 3.51ct lab-grown radiant diamond

This 3.51ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG660405323 or 660405323. Listed at 16 retailers as of October 29, 2026, with prices from $848 to $3,887, a $3,039 spread on the same certified stone. MOH London lists it at $3,887. 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

3.51
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.9°
Pavilion angle28.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG660405323
Dimensions10.40 × 7.19 × 5.03 mm
L/W Ratio1.45
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.40 mm7.19 mm3.51 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG660405323
Side View
Table 63.0%Crown 42.9°Girdle: MED-STKPavilion 28.7°Culet: NoneDepth 70.0%

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: Oct 30
Current: $3,887 NZD|Low: $814 NZD|High: $3,912 NZD|Avg: $1,949 NZD|+0.5%
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
November 1, 2026
Retailer 9$848 NZD
Retailer 3$949 NZD
Retailer 4$951 NZD
Retailer 10$1,052 NZD
Retailer 7$1,304 NZD
Retailer 2$1,435 NZD
Retailer 5$1,609 NZD
Retailer 13$1,643 NZD
Retailer 6$1,747 NZD
Retailer 8$2,828 NZD
Retailer 12$3,384 NZD
Retailer 11$3,694 NZD
MOH London$3,887 NZD

43 data points across 13 retailers

16 retailers$848 NZD to $3,887 NZD

A
Cheapest Retailer
-
$848 NZD
$478 USD
A
Retailer 2
-
$949 NZD
$535 USD
View
Final sale: no returns
A
Retailer 3
-
$951 NZD
$536 USD
View
A
Retailer 4
-
$1,052 NZD
$593 USD
View
Retailer 5
-
$1,052 NZD
$593 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
$1,304 NZD
$735 USD
View
A
Retailer 7
-
$1,435 NZD
£637 GBP
View
B+
Retailer 8
-
$1,609 NZD
$907 USD
View
B+
Retailer 9
-
$1,643 NZD
$926 USD
View
A
Retailer 10
-
$1,747 NZD
£775 GBP
View
B
Retailer 11
-
$2,828 NZD
$1,594 USD
View
B
Retailer 12
-
$3,073 NZD
$1,732 USD
View
B
Retailer 13
-
$3,384 NZD
$1,907 USD
View
B
Retailer 14
-
$3,434 NZD
$1,936 USD
View
B
Retailer 15
-
$3,694 NZD
$2,082 USD
View
Most Expensive
B
MOH London
LG660405323 · Oct 29
$3,887 NZD
£1,725 GBP
View
15 more retailers have this diamond
Prices start from $848 NZDSave up to $3,039 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
3.51ct Radiant
$848 NZD