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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 $1,505 NZD
€808 EUR
As of October 29, 2026
Save $4,368 NZD (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,873 NZD at Brilliant Earth · As of October 29, 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 29, 2026, with prices from $1,505 to $5,873, a $4,368 spread on the same certified stone. Brilliant Earth lists it at $5,873. 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: $5,873 NZD|Low: $601 NZD|High: $6,458 NZD|Avg: $2,313 NZD|-9.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 10$843 NZD
Retailer 4$1,505 NZD
Retailer 7$1,535 NZD
Retailer 8$1,702 NZD
Retailer 9$1,781 NZD
Retailer 2$1,814 NZD
Retailer 6$1,980 NZD
Retailer 5$2,940 NZD
Retailer 3$4,590 NZD
Brilliant Earth$5,873 NZD

37 data points across 10 retailers

13 retailers$1,505 NZD to $5,873 NZD

Retailer 1
-
$752 NZD
$424 USD
Price last confirmed 37 days ago
Retailer 2
-
$843 NZD
$475 USD
View
Price last confirmed 37 days ago
Retailer 3
-
$921 NZD
$519 USD
View
Price last confirmed 33 days ago
A
Retailer 4
-
$1,505 NZD
€808 EUR
View
A
Retailer 5
-
$1,535 NZD
$865 USD
View
B+
Retailer 6
-
$1,702 NZD
$959 USD
View
A
Retailer 7
-
$1,781 NZD
$1,004 USD
View
B+
Retailer 8
-
$1,814 NZD
£805 GBP
View
B+
Retailer 9
-
$1,980 NZD
$1,116 USD
View
B+
Retailer 10
-
$2,940 NZD
$1,657 USD
View
Retailer 11
-
$2,997 NZD
$1,689 USD
View
Price last confirmed 33 days ago
B
Retailer 12
-
$4,590 NZD
£2,037 GBP
View
Most Expensive
B
Brilliant Earth
7880315A · Oct 29
$5,873 NZD
$3,310 USD
View
12 more retailers have this diamond
Prices start from $1,505 NZDSave up to $4,368 NZD

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
$1,505 NZD