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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 $669 CAD
$478 USD
As of October 30, 2026
Save $2,397 CAD (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,066 CAD 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 $669 to $3,066, a $2,397 spread on the same certified stone. MOH London lists it at $3,066. 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
Color
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

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: Oct 30
Current: $3,066 CAD|Low: $749 CAD|High: $3,086 CAD|Avg: $1,771 CAD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 8$749 CAD
Retailer 3$1,029 CAD
Retailer 4$1,132 CAD
Retailer 9$1,269 CAD
Retailer 7$1,296 CAD
Retailer 2$1,378 CAD
Retailer 5$2,231 CAD
Retailer 10$2,424 CAD
Retailer 6$2,914 CAD
MOH London$3,066 CAD

43 data points across 10 retailers

16 retailers$669 CAD to $3,066 CAD

A
Cheapest Retailer
-
$669 CAD
$478 USD
A
Retailer 2
-
$749 CAD
$535 USD
View
Final sale: no returns
A
Retailer 3
-
$750 CAD
$536 USD
View
A
Retailer 4
-
$830 CAD
$593 USD
View
Retailer 5
-
$830 CAD
$593 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
$1,029 CAD
$735 USD
View
Retailer 7
-
$1,132 CAD
£637 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$1,269 CAD
$907 USD
View
B+
Retailer 9
-
$1,296 CAD
$926 USD
View
A
Retailer 10
-
$1,378 CAD
£775 GBP
View
B
Retailer 11
-
$2,231 CAD
$1,594 USD
View
B
Retailer 12
-
$2,424 CAD
$1,732 USD
View
B
Retailer 13
-
$2,669 CAD
$1,907 USD
View
B
Retailer 14
-
$2,709 CAD
$1,936 USD
View
B
Retailer 15
-
$2,914 CAD
$2,082 USD
View
Most Expensive
B
MOH London
LG660405323 · Oct 29
$3,066 CAD
£1,725 GBP
View
15 more retailers have this diamond
Prices start from $669 CADSave up to $2,397 CAD

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
$669 CAD