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Round|Lab Grown|IGI

3.51ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG654401047

Shape and cutting style on the report: Round brilliant

Certificate IGI LG654401047

Diamond specifications and retailer prices

From €338 EUR
$378 USD
As of October 29, 2026
Save €1,398 EUR (81%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €1,736 EUR at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 3.51ct lab-grown round diamond

This 3.51ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG654401047 or 654401047. Listed at 9 retailers as of October 28, 2026, with prices from €338 to €1,736, a €1,398 spread on the same certified stone. Rare Carat lists it at €1,736. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

3.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG654401047
Dimensions9.70 × 9.67 × 6.04 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.70 mm9.67 mm3.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG654401047
Side View
Table 57.0%Crown 35.1°Girdle: MediumPavilion 41.1°Culet: NoneDepth 62.3%

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 29
Current: €1,736 EUR|Low: €338 EUR|High: €4,189 EUR|Avg: €1,384 EUR|-0.9%
Rare Carat
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
October 29, 2026
Retailer 11€338 EUR
Retailer 9€379 EUR
Retailer 2€673 EUR
Retailer 14€718 EUR
Retailer 6€989 EUR
Retailer 5€1,037 EUR
Retailer 3€1,104 EUR
Retailer 10€1,176 EUR
Retailer 8€1,177 EUR
Retailer 12€1,348 EUR
Retailer 7€1,647 EUR
Retailer 13€1,676 EUR
Rare Carat€1,736 EUR
Retailer 4€4,189 EUR

25 data points across 14 retailers

9 retailers€338 EUR to €1,736 EUR

A
Cheapest Retailer
-
€338 EUR
$378 USD
A
Retailer 2
-
€379 EUR
$423 USD
View
A
Retailer 3
-
€673 EUR
View
B+
Retailer 4
-
€1,176 EUR
$1,314 USD
View
B+
Retailer 5
-
€1,177 EUR
$1,315 USD
View
B+
Retailer 6
-
€1,348 EUR
$1,506 USD
View
B+
Retailer 7
-
€1,647 EUR
£1,449 GBP
View
Retailer 8
-
€1,676 EUR
SGD 2,530 SGD
View
Price last confirmed 18 days ago
Most Expensive
B
Rare Carat
LGRD30-86335 · Oct 28
€1,736 EUR
$1,940 USD
View
8 more retailers have this diamond
Prices start from €338 EURSave up to €1,398 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 Round
€338 EUR