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Round|Lab Grown|IGI

3.51ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG594321539

Shape and cutting style on the report: Round brilliant

Certificate IGI LG594321539

Diamond specifications and retailer prices

From $848 USD
€808 EUR
As of October 29, 2026
Save $2,462 USD (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $3,310 USD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

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 LG594321539 or 594321539. Listed at 13 retailers as of October 28, 2026, with prices from $848 to $3,310, a $2,462 spread on the same certified stone. Brilliant Earth lists it at $3,310. 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
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG594321539
Dimensions9.82 × 9.90 × 5.97 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
9.82 mm9.90 mm3.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG594321539
Side View
Table 58.0%Crown 33.8°Girdle: MediumPavilion 41.2°Culet: NoneDepth 60.6%

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: $3,310 USD|Low: $339 USD|High: $3,640 USD|Avg: $1,301 USD|-9.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 10$475 USD
Retailer 4$848 USD
Retailer 7$865 USD
Retailer 8$959 USD
Retailer 9$1,004 USD
Retailer 2$1,019 USD
Retailer 6$1,116 USD
Retailer 5$1,657 USD
Retailer 3$2,587 USD
Brilliant Earth$3,310 USD

36 data points across 10 retailers

13 retailers$848 USD to $3,310 USD

A
Retailer 1
-
$424 USD
Price last confirmed 36 days ago
A
Retailer 2
-
$475 USD
View
Price last confirmed 35 days ago
A
Retailer 3
-
$519 USD
View
Price last confirmed 32 days ago
A
Retailer 4
-
$848 USD
€808 EUR
View
A
Retailer 5
-
$865 USD
View
B+
Retailer 6
-
$959 USD
View
A
Retailer 7
-
$1,004 USD
View
B+
Retailer 8
-
$1,019 USD
£803 GBP
View
B+
Retailer 9
-
$1,116 USD
View
B+
Retailer 10
-
$1,657 USD
View
B+
Retailer 11
-
$1,689 USD
View
Price last confirmed 32 days ago
B
Retailer 12
-
$2,587 USD
£2,037 GBP
View
Most Expensive
B
Brilliant Earth
7880315A · Oct 28
$3,310 USD
View
12 more retailers have this diamond
Prices start from $848 USDSave up to $2,462 USD

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
$848 USD