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Round|Lab Grown|IGI

3.21ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG654411372

Shape and cutting style on the report: Round brilliant

Certificate IGI LG654411372

Diamond specifications and retailer prices

From $401 USD
As of October 29, 2026
Save $1,789 USD (82%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $2,190 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.21ct lab-grown round diamond

This 3.21ct 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 LG654411372 or 654411372. Listed at 21 retailers as of October 29, 2026, with prices from $401 to $2,190, a $1,789 spread on the same certified stone. Brilliant Earth lists it at $2,190. 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

3.21
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG654411372
Dimensions9.44 × 9.49 × 5.81 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.44 mm9.49 mm3.21 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG654411372
Side View
Table 58.0%Crown 35.2°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.4%

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: Oct 29
Current: $2,190 USD|Low: $398 USD|High: $2,190 USD|Avg: $1,095 USD
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
October 30, 2026
Retailer 8$401 USD
Retailer 15$450 USD
Retailer 13$485 USD
Retailer 4$498 USD
Retailer 18$498 USD
Retailer 14$645 USD
Retailer 5$788 USD
Retailer 3$808 USD
Retailer 2$815 USD
Retailer 12$831 USD
Retailer 17$1,091 USD
Retailer 7$1,255 USD
Retailer 9$1,600 USD
Retailer 10$1,636 USD
Retailer 16$1,830 USD
Retailer 6$1,836 USD
Retailer 11$1,955 USD
Brilliant Earth$2,190 USD

44 data points across 18 retailers

21 retailers$401 USD to $2,190 USD

Retailer 1
-
$398 USD
Price last confirmed 38 days ago
A
Retailer 2
-
$401 USD
View
A
Retailer 3
-
$450 USD
View
A
Retailer 4
-
$485 USD
View
Final sale: no returns
Retailer 5
-
$487 USD
View
Price last confirmed 38 days ago
A
Retailer 6
-
$498 USD
View
A
Retailer 7
-
$498 USD
View
A
Retailer 8
-
$645 USD
View
B+
Retailer 9
-
$788 USD
View
A
Retailer 10
-
$808 USD
View
A
Retailer 11
-
$815 USD
£642 GBP
View
A
Retailer 12
-
$831 USD
€791 EUR
View
B+
Retailer 13
-
$1,091 USD
View
B
Retailer 14
-
$1,255 USD
View
Retailer 15
-
$1,585 USD
View
Price last confirmed 39 days ago
B
Retailer 16
-
$1,600 USD
View
B
Retailer 17
-
$1,636 USD
View
Retailer 18
-
$1,830 USD
View
Price last confirmed 12 days ago
B
Retailer 19
-
$1,836 USD
View
B
Retailer 20
-
$1,955 USD
£1,539 GBP
View
Most Expensive
B
Brilliant Earth
14276809A · Oct 29
$2,190 USD
View
20 more retailers have this diamond
Prices start from $401 USDSave up to $1,789 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
3.21ct Round
$401 USD