Radiant|Lab Grown|IGI

3.21ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG675532318

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG675532318

Diamond specifications and retailer prices

From $6,770 USD
As of October 29, 2026
8 retailers carry this diamond
Most expensive: $6,770 USD at Brilliant Earth
View at Brilliant Earth

About this 3.21ct lab-grown radiant diamond

This 3.21ct lab-grown radiant sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG675532318 or 675532318. Listed at 8 retailers as of October 29, 2026. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.21
Carat
E
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle33.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG675532318
Dimensions11.09 × 7.43 × 4.74 mm
L/W Ratio1.49
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.09 mm7.43 mm3.21 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG675532318
Side View
Table 63.0%Crown 37.2°Girdle: MediumPavilion 33.3°Culet: NoneDepth 63.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: $6,770 USD|Low: $967 USD|High: $10,750 USD|Avg: $4,009 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
Retailer 19
September 27, 2026
Retailer 18$1,355 USD
Retailer 15$1,565 USD
Retailer 14$1,659 USD
Retailer 7$1,792 USD
Retailer 4$2,108 USD
Retailer 2$2,239 USD
Retailer 3$2,589 USD
Retailer 9$2,890 USD
Retailer 16$3,516 USD
Retailer 19$3,749 USD
Retailer 6$4,373 USD
Retailer 17$4,640 USD
Retailer 12$5,036 USD
Retailer 8$5,348 USD
Retailer 13$5,392 USD
Retailer 10$5,447 USD
Retailer 11$6,464 USD
Brilliant Earth$6,770 USD
Retailer 5$10,750 USD

13 data points across 19 retailers

8 retailers

A
Retailer 1
-
$1,317 USD
Price last confirmed 32 days ago
A
Retailer 2
-
$1,385 USD
View
Price last confirmed 32 days ago
A
Retailer 3
-
$1,792 USD
HK$14,000 HKD
View
Price last confirmed 55 days ago
B+
Retailer 4
-
$3,516 USD
ZAR 56,802 ZAR
View
Price last confirmed 38 days ago
B+
Retailer 5
-
$3,749 USD
£2,952 GBP
View
Price last confirmed 31 days ago
B+
Retailer 6
-
$5,348 USD
View
Price last confirmed 53 days ago
B+
Retailer 7
-
$5,447 USD
View
Price last confirmed 31 days ago
Most Expensive
B
Brilliant Earth
21305180Y · Oct 29
$6,770 USD
View
7 more retailers have this diamond

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 Radiant
$6,770 USD