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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 $1,208 AUD
€808 EUR
As of October 29, 2026
Save $3,504 AUD (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,711 AUD 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 $1,208 to $4,711, a $3,504 spread on the same certified stone. Brilliant Earth lists it at $4,711. 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 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $4,711 AUD|Low: $483 AUD|High: $5,181 AUD|Avg: $1,852 AUD|-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$676 AUD
Retailer 4$1,208 AUD
Retailer 7$1,231 AUD
Retailer 8$1,365 AUD
Retailer 9$1,429 AUD
Retailer 2$1,451 AUD
Retailer 6$1,589 AUD
Retailer 5$2,359 AUD
Retailer 3$3,682 AUD
Brilliant Earth$4,711 AUD

36 data points across 10 retailers

13 retailers$1,208 AUD to $4,711 AUD

A
Retailer 1
-
$604 AUD
$424 USD
Price last confirmed 36 days ago
A
Retailer 2
-
$676 AUD
$475 USD
View
Price last confirmed 35 days ago
A
Retailer 3
-
$739 AUD
$519 USD
View
Price last confirmed 32 days ago
A
Retailer 4
-
$1,208 AUD
€808 EUR
View
A
Retailer 5
-
$1,231 AUD
$865 USD
View
B+
Retailer 6
-
$1,365 AUD
$959 USD
View
A
Retailer 7
-
$1,429 AUD
$1,004 USD
View
B+
Retailer 8
-
$1,451 AUD
£803 GBP
View
B+
Retailer 9
-
$1,589 AUD
$1,116 USD
View
B+
Retailer 10
-
$2,359 AUD
$1,657 USD
View
B+
Retailer 11
-
$2,404 AUD
$1,689 USD
View
Price last confirmed 32 days ago
B
Retailer 12
-
$3,682 AUD
£2,037 GBP
View
Most Expensive
B
Brilliant Earth
7880315A · Oct 28
$4,711 AUD
$3,310 USD
View
12 more retailers have this diamond
Prices start from $1,208 AUDSave up to $3,504 AUD

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
$1,208 AUD