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Round|Lab Grown|IGI

3.66ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG668433333

Certificate IGI LG668433333

Diamond specifications and retailer prices

From $1,379 USD
Save $8,281 USD (86%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $9,660 USD at Brilliant Earth
View at Brilliant Earth

About this 3.66ct lab-grown round diamond

This 3.66ct lab-grown round 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 LG668433333 or 668433333. Listed at 22 retailers, with prices from $1,379 to $9,660 at Brilliant Earth, a $8,281 spread on the same certified stone. 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

3.66
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG668433333
Dimensions9.78 × 9.85 × 6.10 mm
L/W Ratio1.01
Girdle conditionFaceted
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
9.78 mm9.85 mm3.66 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG668433333
Side View
Table 58.0%Crown 35.9°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 1
Current: $9,660 USD|Low: $984 USD|High: $9,660 USD|Avg: $3,881 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
Retailer 20
October 1, 2026
Retailer 5$1,379 USD
Retailer 11$1,651 USD
Retailer 18$1,700 USD
Retailer 4$2,045 USD
Retailer 14$2,077 USD
Retailer 13$2,205 USD
Retailer 2$2,218 USD
Retailer 19$2,738 USD
Retailer 7$3,213 USD
Retailer 15$3,231 USD
Retailer 20$3,242 USD
Retailer 3$4,413 USD
Retailer 9$4,488 USD
Retailer 16$4,642 USD
Retailer 17$4,786 USD
Retailer 10$5,012 USD
Retailer 8$5,081 USD
Retailer 6$6,160 USD
Retailer 12$7,722 USD
Brilliant Earth$9,660 USD

37 data points across 20 retailers

22 retailers$1,379 USD to $9,660 USD

A
Cheapest Retailer
-
$1,379 USD
A
Retailer 2
-
$1,651 USD
HK$12,900 HKD
View
A
Retailer 3
-
$1,700 USD
View
A
Retailer 4
-
$2,045 USD
View
A
Retailer 5
-
$2,075 USD
£1,634 GBP
View
A
Retailer 6
-
$2,205 USD
View
A
Retailer 7
-
$2,218 USD
€2,112 EUR
View
A
Retailer 8
-
$2,497 USD
View
A
Retailer 9
-
$2,738 USD
View
Price last confirmed 7 days ago
A
Retailer 10
-
$3,213 USD
View
A
Retailer 11
-
$3,231 USD
A$4,971 AUD
View
A
Retailer 12
-
$3,242 USD
ZAR 52,368 ZAR
View
Price last confirmed 10 days ago
B+
Retailer 13
-
$4,413 USD
View
B+
Retailer 14
-
$4,488 USD
View
B+
Retailer 15
-
$4,642 USD
£3,655 GBP
View
B+
Retailer 16
-
$4,786 USD
SGD 6,468 SGD
View
B+
Retailer 17
-
$5,012 USD
View
B+
Retailer 18
-
$5,185 USD
View
B+
Retailer 19
-
$5,722 USD
View
Price last confirmed 22 days ago
B
Retailer 20
-
$6,160 USD
View
B
Retailer 21
-
$7,722 USD
£6,080 GBP
View
Most Expensive
B
Brilliant Earth
14313420A · Oct 1
$9,660 USD
View
21 more retailers have this diamond
Prices start from $1,379 USDSave up to $8,281 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.

A
3.66ct Round
$1,379 USD