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Radiant|Lab Grown|IGI

4.05ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG731593547

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

Certificate IGI LG731593547

Diamond specifications and retailer prices

From $4,381 AUD
€2,931 EUR
As of October 23, 2026
Save $15,718 AUD (78%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $20,098 AUD 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 LG731593547 or 731593547. Listed at 22 retailers as of October 23, 2026, with prices from $4,381 to $20,098, a $15,718 spread on the same certified stone. Brilliant Earth lists it at $20,098. 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
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.9°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731593547
Dimensions7.89 × 7.89 × 5.24 mm
L/W Ratio1.00
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
7.89 mm7.89 mm4.05 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731593547
Side View
Table 65.0%Crown 43.9°Girdle: Slightly ThickPavilion 34.2°Culet: NoneDepth 66.4%

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 23
Current: $20,098 AUD|Low: $2,689 AUD|High: $20,098 AUD|Avg: $6,542 AUD|+70.9%
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
October 30, 2026
Retailer 7$4,381 AUD
Retailer 8$4,803 AUD
Retailer 6$4,847 AUD
Retailer 3$4,918 AUD
Retailer 2$6,335 AUD
Retailer 9$6,447 AUD
Retailer 5$7,049 AUD
Retailer 14$8,091 AUD
Retailer 13$8,098 AUD
Retailer 10$9,981 AUD
Retailer 15$11,779 AUD
Retailer 11$11,949 AUD
Retailer 16$12,282 AUD
Retailer 12$13,052 AUD
Retailer 4$16,338 AUD
Brilliant Earth$20,098 AUD

33 data points across 16 retailers

22 retailers$4,381 AUD to $20,098 AUD

Retailer 1
-
$2,401 AUD
$1,687 USD
Price last confirmed 21 days ago
Retailer 2
-
$2,786 AUD
$1,957 USD
View
Price last confirmed 27 days ago
Retailer 3
-
$2,786 AUD
$1,957 USD
View
Price last confirmed 17 days ago
Retailer 4
-
$2,884 AUD
$2,026 USD
View
Price last confirmed 35 days ago
A
Retailer 5
-
$4,381 AUD
€2,931 EUR
View
A
Retailer 6
-
$4,803 AUD
$3,374 USD
View
A
Retailer 7
-
$4,847 AUD
$3,405 USD
View
A
Retailer 8
-
$4,918 AUD
$3,455 USD
View
Retailer 9
-
$5,221 AUD
$3,668 USD
View
Price last confirmed 25 days ago
A
Retailer 10
-
$6,335 AUD
£3,504 GBP
View
A
Retailer 11
-
$6,447 AUD
$4,529 USD
View
Final sale: no returns
A
Retailer 12
-
$7,049 AUD
$4,952 USD
View
A
Retailer 13
-
$8,091 AUD
£4,476 GBP
View
A
Retailer 14
-
$8,098 AUD
$5,689 USD
View
B+
Retailer 15
-
$9,981 AUD
ZAR 113,279 ZAR
View
B+
Retailer 16
-
$11,219 AUD
$7,882 USD
View
B
Retailer 17
-
$11,779 AUD
$8,275 USD
View
B
Retailer 18
-
$11,949 AUD
£6,610 GBP
View
B+
Retailer 19
-
$12,282 AUD
$8,629 USD
View
B+
Retailer 20
-
$13,052 AUD
$9,170 USD
View
B
Retailer 21
-
$16,338 AUD
$11,478 USD
View
Most Expensive
B
Brilliant Earth
15785857A · Oct 29
$20,098 AUD
$14,120 USD
View
21 more retailers have this diamond
Prices start from $4,381 AUDSave up to $15,718 AUD

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
$4,381 AUD