Round|Lab Grown|IGI

3.50ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG818686987

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686987

Diamond specifications and retailer prices

From €4,055 EUR
$4,530 USD
As of October 25, 2026
13 retailers carry this diamond
Most expensive: €4,055 EUR at Brilliant Earth
View at Brilliant Earth

About this 3.5ct lab-grown round diamond

This 3.5ct 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 LG818686987 or 818686987. Listed at 13 retailers as of October 25, 2026. 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

3.50
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686987
Dimensions9.77 × 9.86 × 5.92 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.77 mm9.86 mm3.50 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686987
Side View
Table 62.0%Crown 33.4°Girdle: MediumPavilion 41.5°Culet: NoneDepth 60.2%

Caratlytics Score

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C
Average
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Price History

Last verified: Oct 25
Current: €4,055 EUR|Low: €456 EUR|High: €4,055 EUR|Avg: €1,219 EUR|+8.6%
Brilliant Earth
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 25, 2026
Retailer 14€474 EUR
Retailer 5€530 EUR
Retailer 18€531 EUR
Retailer 4€588 EUR
Retailer 7€588 EUR
Retailer 13€680 EUR
Retailer 17€793 EUR
Retailer 10€855 EUR
Retailer 12€888 EUR
Retailer 15€896 EUR
Retailer 3€910 EUR
Retailer 19€1,004 EUR
Retailer 2€1,518 EUR
Retailer 9€1,547 EUR
Retailer 6€1,786 EUR
Retailer 11€1,911 EUR
Retailer 8€2,011 EUR
Retailer 16€2,478 EUR
Brilliant Earth€4,055 EUR

16 data points across 19 retailers

13 retailers

Retailer 1
-
€474 EUR
$530 USD
Price last confirmed 20 days ago
Retailer 2
-
€531 EUR
$593 USD
View
Price last confirmed 18 days ago
Retailer 3
-
€588 EUR
$657 USD
View
Price last confirmed 26 days ago
Retailer 4
-
€588 EUR
$657 USD
View
Price last confirmed 20 days ago
Retailer 5
-
€793 EUR
£698 GBP
View
Price last confirmed 24 days ago
Retailer 6
-
€910 EUR
$1,017 USD
View
Price last confirmed 17 days ago
Retailer 7
-
€1,518 EUR
$1,696 USD
View
Price last confirmed 15 days ago
Retailer 8
-
€1,547 EUR
$1,728 USD
View
Price last confirmed 23 days ago
Retailer 9
-
€1,786 EUR
$1,995 USD
View
Price last confirmed 23 days ago
Retailer 10
-
€1,911 EUR
$2,135 USD
View
Price last confirmed 15 days ago
Retailer 11
-
€2,011 EUR
$2,246 USD
View
Price last confirmed 17 days ago
Retailer 12
-
€2,478 EUR
£2,180 GBP
View
Price last confirmed 23 days ago
Most Expensive
C
Brilliant Earth
21805039A · Oct 25
€4,055 EUR
$4,530 USD
View
12 more retailers have this diamond

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.

C
3.50ct Round
€4,055 EUR