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Round|Lab Grown|IGI

3.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG600342277

Shape and cutting style on the report: Round brilliant

Certificate IGI LG600342277

Diamond specifications and retailer prices

From $810 USD
As of October 31, 2026
Save $1,920 USD (70%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,730 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 LG600342277 or 600342277. Listed at 15 retailers as of October 31, 2026, with prices from $810 to $2,730, a $1,920 spread on the same certified stone. Brilliant Earth lists it at $2,730. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG600342277
Dimensions9.74 × 9.72 × 6.00 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.74 mm9.72 mm3.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG600342277
Side View
Table 58.0%Crown 35.4°Girdle: MediumPavilion 40.7°Culet: NoneDepth 61.6%

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 31
Current: $2,730 USD|Low: $494 USD|High: $2,920 USD|Avg: $1,257 USD|-6.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 4$494 USD
Retailer 3$696 USD
Retailer 9$810 USD
Retailer 6$834 USD
Retailer 12$904 USD
Retailer 5$949 USD
Retailer 10$969 USD
Retailer 11$1,286 USD
Retailer 7$1,556 USD
Retailer 8$1,895 USD
Retailer 2$2,126 USD
Brilliant Earth$2,730 USD

36 data points across 12 retailers

15 retailers$810 USD to $2,730 USD

Retailer 1
-
$398 USD
Price last confirmed 39 days ago
Retailer 2
-
$446 USD
View
Price last confirmed 39 days ago
Retailer 3
-
$487 USD
View
Price last confirmed 35 days ago
Retailer 4
-
$696 USD
£548 GBP
View
Price last confirmed 24 days ago
A
Retailer 5
-
$810 USD
View
A
Retailer 6
-
$834 USD
€794 EUR
View
B+
Retailer 7
-
$904 USD
View
A
Retailer 8
-
$949 USD
£747 GBP
View
A
Retailer 9
-
$969 USD
View
B+
Retailer 10
-
$1,286 USD
View
B
Retailer 11
-
$1,556 USD
View
Retailer 12
-
$1,587 USD
View
Price last confirmed 35 days ago
B
Retailer 13
-
$1,895 USD
View
B
Retailer 14
-
$2,126 USD
£1,674 GBP
View
Most Expensive
B
Brilliant Earth
8367372A · Oct 31
$2,730 USD
View
14 more retailers have this diamond
Prices start from $810 USDSave up to $1,920 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
$810 USD