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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 $372 USD
As of November 1, 2026
Save $2,068 USD (85%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,440 USD at Brilliant Earth · As of October 31, 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 October 31, 2026, with prices from $372 to $2,440, a $2,068 spread on the same certified stone. Brilliant Earth lists it at $2,440. 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
Color
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

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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: $2,440 USD|Low: $368 USD|High: $4,570 USD|Avg: $1,436 USD|-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$372 USD
Retailer 8$432 USD
Retailer 6$646 USD
Retailer 2$742 USD
Retailer 9$870 USD
Retailer 7$1,354 USD
Retailer 5$1,355 USD
Retailer 10$1,484 USD
Retailer 4$1,807 USD
Retailer 11$1,872 USD
Brilliant Earth$2,440 USD

30 data points across 11 retailers

11 retailers$372 USD to $2,440 USD

A
Cheapest Retailer
-
$372 USD
A
Retailer 2
-
$432 USD
View
Retailer 3
-
$646 USD
£509 GBP
View
Price last confirmed 15 days ago
A
Retailer 4
-
$742 USD
€707 EUR
View
A
Retailer 5
-
$870 USD
View
B+
Retailer 6
-
$1,354 USD
View
B+
Retailer 7
-
$1,355 USD
View
B+
Retailer 8
-
$1,484 USD
View
B+
Retailer 9
-
$1,807 USD
£1,423 GBP
View
Retailer 10
-
$1,872 USD
SGD 2,530 SGD
View
Price last confirmed 19 days ago
Most Expensive
B
Brilliant Earth
20802674A · Oct 31
$2,440 USD
View
10 more retailers have this diamond
Prices start from $372 USDSave up to $2,068 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
$372 USD