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Round|Lab Grown|IGI

3.10ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG629431039

Shape and cutting style on the report: Round brilliant

Certificate IGI LG629431039

Diamond specifications and retailer prices

From $1,238 USD
CA$1,719 CAD
As of October 30, 2026
Save $399 USD (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,637 USD at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.1ct lab-grown round diamond

This 3.1ct lab-grown round sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG629431039 or 629431039. Listed at 2 retailers as of October 30, 2026, with prices from $1,238 to $1,637, a $399 spread on the same certified stone. The Diamond Guys lists it at $1,637. 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

3.10
Carat
G
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629431039
Dimensions9.22 × 9.16 × 5.82 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.22 mm9.16 mm3.10 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629431039
Side View
Table 56.0%Crown 36.3°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.3%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: $540 USD|Low: $248 USD|High: $3,010 USD|Avg: $1,381 USD|-38.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
The Diamond Guys
August 9, 2026
Retailer 9$256 USD
Retailer 1$540 USD
Retailer 8$548 USD
Retailer 5$670 USD
Retailer 12$767 USD
Retailer 2$822 USD
Retailer 7$997 USD
Retailer 10$1,050 USD
Retailer 6$1,082 USD
Retailer 13$1,238 USD
The Diamond Guys$1,637 USD
Retailer 4$1,879 USD
Retailer 11$2,240 USD
Retailer 3$2,570 USD

63 data points across 14 retailers

2 retailers$1,238 USD to $1,637 USD

B+
Cheapest Retailer
-
$1,238 USD
CA$1,719 CAD
Most Expensive
B
The Diamond Guys
1954434480 · Oct 30
$1,637 USD
View
1 more retailer has this diamond
Prices start from $1,238 USDSave up to $399 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.

B+
3.10ct Round
$1,238 USD