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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 $680 AUD
$478 USD
As of October 30, 2026
Save $2,438 AUD (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,119 AUD 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 $680 to $3,119, a $2,438 spread on the same certified stone. MOH London lists it at $3,119. 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

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: $3,119 AUD|Low: $653 AUD|High: $3,139 AUD|Avg: $1,564 AUD|+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
October 31, 2026
Retailer 9$680 AUD
Retailer 3$762 AUD
Retailer 4$763 AUD
Retailer 10$844 AUD
Retailer 7$1,046 AUD
Retailer 6$1,155 AUD
Retailer 5$1,291 AUD
Retailer 13$1,318 AUD
Retailer 2$1,402 AUD
Retailer 8$2,269 AUD
Retailer 12$2,715 AUD
Retailer 11$2,964 AUD
MOH London$3,119 AUD

42 data points across 13 retailers

16 retailers$680 AUD to $3,119 AUD

A
Cheapest Retailer
-
$680 AUD
$478 USD
A
Retailer 2
-
$762 AUD
$535 USD
View
Final sale: no returns
A
Retailer 3
-
$763 AUD
$536 USD
View
A
Retailer 4
-
$844 AUD
$593 USD
View
Retailer 5
-
$844 AUD
$593 USD
View
Price last confirmed 15 days ago
A
Retailer 6
-
$1,046 AUD
$735 USD
View
A
Retailer 7
-
$1,155 AUD
£639 GBP
View
B+
Retailer 8
-
$1,291 AUD
$907 USD
View
B+
Retailer 9
-
$1,318 AUD
$926 USD
View
A
Retailer 10
-
$1,402 AUD
£775 GBP
View
B
Retailer 11
-
$2,269 AUD
$1,594 USD
View
B
Retailer 12
-
$2,466 AUD
$1,732 USD
View
B
Retailer 13
-
$2,715 AUD
$1,907 USD
View
B
Retailer 14
-
$2,755 AUD
$1,936 USD
View
B
Retailer 15
-
$2,964 AUD
$2,082 USD
View
Most Expensive
B
MOH London
LG660405323 · Oct 29
$3,119 AUD
£1,725 GBP
View
15 more retailers have this diamond
Prices start from $680 AUDSave up to $2,438 AUD

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
$680 AUD