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Round|Lab Grown|IGI

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 $531 AUD
$372 USD
As of November 1, 2026
Save $2,951 AUD (85%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,482 AUD 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 11 retailers as of November 1, 2026, with prices from $531 to $3,482, a $2,951 spread on the same certified stone. Brilliant Earth lists it at $3,482. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $3,482 AUD|Low: $525 AUD|High: $6,521 AUD|Avg: $2,049 AUD|-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$531 AUD
Retailer 8$616 AUD
Retailer 6$922 AUD
Retailer 2$1,059 AUD
Retailer 9$1,241 AUD
Retailer 7$1,932 AUD
Retailer 5$1,933 AUD
Retailer 10$2,118 AUD
Retailer 4$2,579 AUD
Retailer 11$2,671 AUD
Brilliant Earth$3,482 AUD

30 data points across 11 retailers

11 retailers$531 AUD to $3,482 AUD

A
Cheapest Retailer
-
$531 AUD
$372 USD
A
Retailer 2
-
$616 AUD
$432 USD
View
Retailer 3
-
$922 AUD
£509 GBP
View
Price last confirmed 16 days ago
A
Retailer 4
-
$1,059 AUD
€707 EUR
View
A
Retailer 5
-
$1,241 AUD
$870 USD
View
B+
Retailer 6
-
$1,932 AUD
$1,354 USD
View
B+
Retailer 7
-
$1,933 AUD
$1,355 USD
View
B+
Retailer 8
-
$2,118 AUD
$1,484 USD
View
B+
Retailer 9
-
$2,579 AUD
£1,423 GBP
View
Retailer 10
-
$2,671 AUD
SGD 2,530 SGD
View
Price last confirmed 20 days ago
Most Expensive
B
Brilliant Earth
20802674A · Nov 2
$3,482 AUD
$2,440 USD
View
10 more retailers have this diamond
Prices start from $531 AUDSave up to $2,951 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
$531 AUD