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Round|Lab Grown|IGI

4.05ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG659458971

Shape and cutting style on the report: Round brilliant

Certificate IGI LG659458971

Diamond specifications and retailer prices

From $2,387 USD
As of October 31, 2026
Save $14,143 USD (86%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $16,530 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 4.05ct lab-grown round diamond

This 4.05ct 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 LG659458971 or 659458971. Listed at 23 retailers as of October 31, 2026, with prices from $2,387 to $16,530, a $14,143 spread on the same certified stone. Brilliant Earth lists it at $16,530. 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

4.05
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG659458971
Dimensions10.21 × 10.26 × 6.29 mm
L/W Ratio1.00
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
10.21 mm10.26 mm4.05 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG659458971
Side View
Table 57.0%Crown 34.5°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.5%

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 31
Current: $16,530 USD|Low: $2,387 USD|High: $16,530 USD|Avg: $5,487 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
November 1, 2026
Retailer 6$2,387 USD
Retailer 5$2,631 USD
Retailer 10$2,640 USD
Retailer 7$3,362 USD
Retailer 14$3,535 USD
Retailer 13$3,615 USD
Retailer 9$4,389 USD
Retailer 11$5,265 USD
Retailer 2$5,299 USD
Retailer 3$6,387 USD
Retailer 12$6,746 USD
Retailer 4$8,270 USD
Retailer 8$9,488 USD
Brilliant Earth$16,530 USD

44 data points across 14 retailers

23 retailers$2,387 USD to $16,530 USD

Retailer 1
-
$2,132 USD
Price last confirmed 21 days ago
Retailer 2
-
$2,320 USD
View
Price last confirmed 18 days ago
A
Retailer 3
-
$2,387 USD
View
Final sale: no returns
Retailer 4
-
$2,473 USD
View
Price last confirmed 21 days ago
Retailer 5
-
$2,473 USD
View
Price last confirmed 29 days ago
A
Retailer 6
-
$2,631 USD
View
A
Retailer 7
-
$2,640 USD
View
A
Retailer 8
-
$3,362 USD
£2,648 GBP
View
Retailer 9
-
$3,400 USD
View
Price last confirmed 24 days ago
A
Retailer 10
-
$3,535 USD
View
A
Retailer 11
-
$3,615 USD
View
A
Retailer 12
-
$4,092 USD
View
A
Retailer 13
-
$4,389 USD
€4,180 EUR
View
A
Retailer 14
-
$5,265 USD
ZAR 85,055 ZAR
View
A
Retailer 15
-
$5,299 USD
A$8,152 AUD
View
B+
Retailer 16
-
$6,387 USD
View
B+
Retailer 17
-
$6,664 USD
View
B+
Retailer 18
-
$6,746 USD
£5,312 GBP
View
B+
Retailer 19
-
$7,017 USD
View
B+
Retailer 20
-
$8,270 USD
SGD 11,176 SGD
View
B+
Retailer 21
-
$8,648 USD
View
B+
Retailer 22
-
$9,488 USD
A$14,597 AUD
View
Most Expensive
B
Brilliant Earth
19018483A · Oct 31
$16,530 USD
View
22 more retailers have this diamond
Prices start from $2,387 USDSave up to $14,143 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
4.05ct Round
$2,387 USD