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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 €428 EUR
$478 USD
As of October 30, 2026
Save €1,533 EUR (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €1,961 EUR 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 €428 to €1,961, a €1,533 spread on the same certified stone. MOH London lists it at €1,961. 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

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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: €1,961 EUR|Low: €411 EUR|High: €1,973 EUR|Avg: €983 EUR|+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€428 EUR
Retailer 3€479 EUR
Retailer 4€480 EUR
Retailer 10€531 EUR
Retailer 7€658 EUR
Retailer 6€726 EUR
Retailer 5€812 EUR
Retailer 13€829 EUR
Retailer 2€881 EUR
Retailer 8€1,427 EUR
Retailer 12€1,707 EUR
Retailer 11€1,863 EUR
MOH London€1,961 EUR

42 data points across 13 retailers

16 retailers€428 EUR to €1,961 EUR

A
Cheapest Retailer
-
€428 EUR
$478 USD
A
Retailer 2
-
€479 EUR
$535 USD
View
Final sale: no returns
A
Retailer 3
-
€480 EUR
$536 USD
View
A
Retailer 4
-
€531 EUR
$593 USD
View
Retailer 5
-
€531 EUR
$593 USD
View
Price last confirmed 15 days ago
A
Retailer 6
-
€658 EUR
$735 USD
View
A
Retailer 7
-
€726 EUR
£639 GBP
View
B+
Retailer 8
-
€812 EUR
$907 USD
View
B+
Retailer 9
-
€829 EUR
$926 USD
View
A
Retailer 10
-
€881 EUR
£775 GBP
View
B
Retailer 11
-
€1,427 EUR
$1,594 USD
View
B
Retailer 12
-
€1,550 EUR
$1,732 USD
View
B
Retailer 13
-
€1,707 EUR
$1,907 USD
View
B
Retailer 14
-
€1,733 EUR
$1,936 USD
View
B
Retailer 15
-
€1,863 EUR
$2,082 USD
View
Most Expensive
B
MOH London
LG660405323 · Oct 29
€1,961 EUR
£1,725 GBP
View
15 more retailers have this diamond
Prices start from €428 EURSave up to €1,533 EUR

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
€428 EUR