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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 $4,530 USD
As of October 25, 2026
13 retailers carry this diamond
Most expensive: $4,530 USD 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
Color
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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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 25
Current: $4,530 USD|Low: $509 USD|High: $4,530 USD|Avg: $1,362 USD|+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$530 USD
Retailer 5$592 USD
Retailer 18$593 USD
Retailer 4$657 USD
Retailer 7$657 USD
Retailer 13$760 USD
Retailer 17$886 USD
Retailer 10$955 USD
Retailer 12$992 USD
Retailer 15$1,001 USD
Retailer 3$1,017 USD
Retailer 19$1,122 USD
Retailer 2$1,696 USD
Retailer 9$1,728 USD
Retailer 6$1,995 USD
Retailer 11$2,135 USD
Retailer 8$2,246 USD
Retailer 16$2,769 USD
Brilliant Earth$4,530 USD

16 data points across 19 retailers

13 retailers

A
Retailer 1
-
$530 USD
Price last confirmed 18 days ago
A
Retailer 2
-
$593 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
$657 USD
View
Price last confirmed 24 days ago
A
Retailer 4
-
$657 USD
View
Price last confirmed 18 days ago
A
Retailer 5
-
$886 USD
£698 GBP
View
Price last confirmed 22 days ago
B+
Retailer 6
-
$1,017 USD
View
Price last confirmed 15 days ago
B
Retailer 7
-
$1,696 USD
View
Price last confirmed 13 days ago
B+
Retailer 8
-
$1,728 USD
View
Price last confirmed 21 days ago
B
Retailer 9
-
$1,995 USD
View
Price last confirmed 21 days ago
B
Retailer 10
-
$2,135 USD
View
Price last confirmed 13 days ago
B
Retailer 11
-
$2,246 USD
View
Price last confirmed 15 days ago
B
Retailer 12
-
$2,769 USD
£2,180 GBP
View
Price last confirmed 21 days ago
Most Expensive
C
Brilliant Earth
21805039A · Oct 25
$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.

A
3.50ct Round
$4,530 USD