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3.51ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG819620033

Shape and cutting style on the report: Round brilliant

Certificate IGI LG819620033

Diamond specifications and retailer prices

From $661 NZD
$372 USD
As of November 1, 2026
Save $3,675 NZD (85%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,337 NZD at Brilliant Earth · As of November 2, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG819620033 or 819620033. Listed at 10 retailers as of November 1, 2026, with prices from $661 to $4,337, a $3,675 spread on the same certified stone. Brilliant Earth lists it at $4,337. 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
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG819620033
Dimensions9.82 × 9.89 × 5.83 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
9.82 mm9.89 mm3.51 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG819620033
Side View
Table 61.0%Crown 32.2°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 59.2%

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: Nov 1
Current: $4,337 NZD|Low: $654 NZD|High: $8,122 NZD|Avg: $2,552 NZD|-46.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 3$661 NZD
Retailer 8$768 NZD
Retailer 6$1,148 NZD
Retailer 2$1,319 NZD
Retailer 9$1,546 NZD
Retailer 7$2,406 NZD
Retailer 5$2,408 NZD
Retailer 10$2,638 NZD
Retailer 4$3,212 NZD
Retailer 11$3,327 NZD
Brilliant Earth$4,337 NZD

30 data points across 11 retailers

10 retailers$661 NZD to $4,337 NZD

A
Cheapest Retailer
-
$661 NZD
$372 USD
A
Retailer 2
-
$768 NZD
$432 USD
View
A
Retailer 3
-
$1,319 NZD
€707 EUR
View
A
Retailer 4
-
$1,546 NZD
$870 USD
View
B+
Retailer 5
-
$2,406 NZD
$1,354 USD
View
B+
Retailer 6
-
$2,408 NZD
$1,355 USD
View
B+
Retailer 7
-
$2,638 NZD
$1,484 USD
View
Retailer 8
-
$3,212 NZD
£1,423 GBP
View
Price last confirmed 7 days ago
Retailer 9
-
$3,327 NZD
SGD 2,530 SGD
View
Price last confirmed 21 days ago
Most Expensive
B
Brilliant Earth
20802674A · Nov 2
$4,337 NZD
$2,440 USD
View
9 more retailers have this diamond
Prices start from $661 NZDSave up to $3,675 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
$661 NZD