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Cushion|Lab Grown|IGI

4.05ct E IF Cushion Lab Grown Diamond

EX • E/IF • IGI LG771607368

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG771607368

Diamond specifications and retailer prices

From $4,377 USD
£3,446 GBP
As of October 30, 2026
Save $14,338 USD (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $18,715 USD at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 4.05ct lab-grown cushion diamond

This 4.05ct lab-grown cushion 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 LG771607368 or 771607368. Listed at 16 retailers as of October 30, 2026, with prices from $4,377 to $18,715, a $14,338 spread on the same certified stone. Taylor and Hart lists it at $18,715. 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 angle33.9°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771607368
Dimensions10.67 × 8.17 × 5.52 mm
L/W Ratio1.31
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.67 mm8.17 mm4.05 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771607368
Side View
Table 63.0%Crown 33.9°Girdle: STK-THKPavilion 37.6°Culet: NoneDepth 67.6%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: $4,377 USD|Low: $4,362 USD|High: $18,013 USD|Avg: $9,376 USD|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 1$4,377 USD
Retailer 3$5,001 USD
Retailer 9$5,239 USD
Retailer 4$6,801 USD
Retailer 10$8,104 USD
Retailer 6$8,438 USD
Retailer 7$10,905 USD
Retailer 5$11,150 USD
Retailer 8$11,478 USD
Retailer 11$13,191 USD
Retailer 2$18,013 USD

39 data points across 11 retailers

16 retailers$4,377 USD to $18,715 USD

A
Cheapest Retailer
-
$4,377 USD
£3,446 GBP
A
Retailer 2
-
$5,001 USD
View
A
Retailer 3
-
$5,058 USD
View
Final sale: no returns
Retailer 4
-
$5,239 USD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$5,280 USD
View
A
Retailer 6
-
$6,269 USD
View
A
Retailer 7
-
$6,801 USD
£5,355 GBP
View
A
Retailer 8
-
$7,391 USD
£5,820 GBP
View
B+
Retailer 9
-
$8,104 USD
View
B+
Retailer 10
-
$8,438 USD
€8,036 EUR
View
B+
Retailer 11
-
$10,905 USD
£8,587 GBP
View
B+
Retailer 12
-
$11,150 USD
ZAR 180,133 ZAR
View
Retailer 13
-
$11,478 USD
A$17,658 AUD
View
Price last confirmed 8 days ago
B+
Retailer 14
-
$13,191 USD
View
B
Retailer 15
-
$18,013 USD
SGD 24,342 SGD
View
Most Expensive
B
Taylor and Hart
R8JQKCD · Oct 30
$18,715 USD
View
15 more retailers have this diamond
Prices start from $4,377 USDSave up to $14,338 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 Cushion
$4,377 USD