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Round|Lab Grown|IGI

3.10ct D SI2 Round Lab Grown Diamond

ID • D/SI2 • IGI LG691590668

Shape and cutting style on the report: Round brilliant

Certificate IGI LG691590668

Diamond specifications and retailer prices

From $421 USD
As of October 29, 2026
Save $2,299 USD (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,720 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.1ct lab-grown round diamond

This 3.1ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG691590668 or 691590668. Listed at 15 retailers as of October 29, 2026, with prices from $421 to $2,720, a $2,299 spread on the same certified stone. Brilliant Earth lists it at $2,720. 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
D
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG691590668
Dimensions9.40 × 9.36 × 5.75 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.40 mm9.36 mm3.10 ctD / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG691590668
Side View
Table 58.0%Crown 33.4°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.3%

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: Oct 29
Current: $2,720 USD|Low: $404 USD|High: $3,890 USD|Avg: $1,112 USD|-30.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 8$421 USD
Retailer 3$522 USD
Retailer 9$522 USD
Retailer 10$700 USD
Retailer 2$831 USD
Retailer 4$858 USD
Retailer 11$901 USD
Retailer 5$1,227 USD
Retailer 7$1,254 USD
Retailer 6$1,920 USD
Brilliant Earth$2,720 USD

44 data points across 11 retailers

15 retailers$421 USD to $2,720 USD

A
Cheapest Retailer
-
$421 USD
A
Retailer 2
-
$472 USD
View
A
Retailer 3
-
$522 USD
View
A
Retailer 4
-
$522 USD
View
B+
Retailer 5
-
$700 USD
View
A
Retailer 6
-
$831 USD
€791 EUR
View
A
Retailer 7
-
$858 USD
£675 GBP
View
A
Retailer 8
-
$901 USD
View
B+
Retailer 9
-
$1,128 USD
View
B+
Retailer 10
-
$1,227 USD
A$1,888 AUD
View
B+
Retailer 11
-
$1,254 USD
View
Retailer 12
-
$1,347 USD
View
Price last confirmed 45 days ago
B
Retailer 13
-
$1,678 USD
View
B
Retailer 14
-
$1,920 USD
£1,512 GBP
View
Most Expensive
B
Brilliant Earth
13678752A · Oct 30
$2,720 USD
View
14 more retailers have this diamond
Prices start from $421 USDSave up to $2,299 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
3.10ct Round
$421 USD