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Round|Lab Grown|IGI

3.50ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG660427313

Shape and cutting style on the report: Round brilliant

Certificate IGI LG660427313

Diamond specifications and retailer prices

From $403 USD
As of October 29, 2026
Save $2,787 USD (87%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $3,190 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 3.5ct lab-grown round diamond

This 3.5ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG660427313 or 660427313. Listed at 9 retailers as of October 29, 2026, with prices from $403 to $3,190, a $2,787 spread on the same certified stone. Brilliant Earth lists it at $3,190. 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

3.50
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG660427313
Dimensions9.73 × 9.66 × 5.99 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.73 mm9.66 mm3.50 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG660427313
Side View
Table 58.0%Crown 35.2°Girdle: MediumPavilion 40.7°Culet: NoneDepth 61.7%

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: $3,190 USD|Low: $400 USD|High: $3,280 USD|Avg: $1,566 USD|-2.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 29, 2026
Retailer 11$403 USD
Retailer 9$451 USD
Retailer 2$800 USD
Retailer 14$921 USD
Retailer 6$1,172 USD
Retailer 5$1,234 USD
Retailer 10$1,402 USD
Retailer 8$1,405 USD
Retailer 3$1,590 USD
Retailer 12$1,607 USD
Retailer 7$1,956 USD
Retailer 13$2,000 USD
Retailer 4$2,820 USD
Brilliant Earth$3,190 USD

24 data points across 14 retailers

9 retailers$403 USD to $3,190 USD

A
Cheapest Retailer
-
$403 USD
A
Retailer 2
-
$451 USD
View
A
Retailer 3
-
$800 USD
€762 EUR
View
B+
Retailer 4
-
$1,402 USD
View
B+
Retailer 5
-
$1,405 USD
View
B+
Retailer 6
-
$1,607 USD
View
B
Retailer 7
-
$1,956 USD
£1,540 GBP
View
Retailer 8
-
$2,000 USD
SGD 2,703 SGD
View
Price last confirmed 18 days ago
Most Expensive
B
Brilliant Earth
20804927A · Oct 31
$3,190 USD
View
8 more retailers have this diamond
Prices start from $403 USDSave up to $2,787 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
3.50ct Round
$403 USD