Radiant|Lab Grown|IGI

4.05ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG812620035

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

Certificate IGI LG812620035

Diamond specifications and retailer prices

From $3,549 USD
As of October 29, 2026
Save $10,571 USD (75%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $14,120 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4.05ct lab-grown radiant diamond

This 4.05ct 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 LG812620035 or 812620035. Listed at 22 retailers as of October 29, 2026, with prices from $3,549 to $14,120, a $10,571 spread on the same certified stone. Brilliant Earth lists it at $14,120. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG812620035
Dimensions11.56 × 7.73 × 5.20 mm
L/W Ratio1.50
Girdle conditionFaceted
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
11.56 mm7.73 mm4.05 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG812620035
Side View
Table 64.0%Crown 44°Girdle: MED-STKPavilion 34.8°Culet: NoneDepth 67.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: $14,120 USD|Low: $2,270 USD|High: $14,120 USD|Avg: $6,873 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
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Retailer 17
October 29, 2026
Retailer 16$3,549 USD
Retailer 3$3,835 USD
Retailer 9$4,733 USD
Retailer 10$4,869 USD
Retailer 6$5,215 USD
Retailer 5$5,540 USD
Retailer 13$5,799 USD
Retailer 14$6,355 USD
Retailer 8$6,695 USD
Retailer 7$7,069 USD
Retailer 2$7,823 USD
Retailer 15$8,828 USD
Retailer 11$9,368 USD
Retailer 17$9,664 USD
Retailer 12$10,196 USD
Retailer 4$12,842 USD
Brilliant Earth$14,120 USD

37 data points across 17 retailers

22 retailers$3,549 USD to $14,120 USD

Retailer 1
-
$2,840 USD
Price last confirmed 21 days ago
Retailer 2
-
$3,249 USD
View
Price last confirmed 34 days ago
Retailer 3
-
$3,294 USD
View
Price last confirmed 26 days ago
Retailer 4
-
$3,294 USD
View
Price last confirmed 19 days ago
A
Retailer 5
-
$3,549 USD
View
Final sale: no returns
A
Retailer 6
-
$3,835 USD
View
Retailer 7
-
$4,528 USD
View
Price last confirmed 29 days ago
A
Retailer 8
-
$4,733 USD
View
A
Retailer 9
-
$4,869 USD
£3,834 GBP
View
A
Retailer 10
-
$5,215 USD
€4,967 EUR
View
A
Retailer 11
-
$5,540 USD
View
A
Retailer 12
-
$5,799 USD
View
B+
Retailer 13
-
$6,355 USD
£5,004 GBP
View
A
Retailer 14
-
$6,695 USD
View
Retailer 15
-
$7,069 USD
A$10,875 AUD
View
Price last confirmed 7 days ago
B+
Retailer 16
-
$7,823 USD
ZAR 126,387 ZAR
View
B+
Retailer 17
-
$8,828 USD
View
B+
Retailer 18
-
$9,368 USD
£7,376 GBP
View
B+
Retailer 19
-
$9,664 USD
View
B+
Retailer 20
-
$10,196 USD
View
B
Retailer 21
-
$12,842 USD
View
Most Expensive
B
Brilliant Earth
20893184A · Oct 29
$14,120 USD
View
21 more retailers have this diamond
Prices start from $3,549 USDSave up to $10,571 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 Radiant
$3,549 USD