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Round|Lab Grown|IGI

4.05ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG811634833

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811634833

Diamond specifications and retailer prices

From $4,876 AUD
$3,425 USD
As of October 30, 2026
Save $15,140 AUD (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $20,016 AUD at Brilliant Earth · As of October 30, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811634833 or 811634833. Listed at 14 retailers as of October 30, 2026, with prices from $4,876 to $20,016, a $15,140 spread on the same certified stone. Brilliant Earth lists it at $20,016. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811634833
Dimensions10.27 × 10.32 × 6.22 mm
L/W Ratio1.00
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
10.27 mm10.32 mm4.05 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811634833
Side View
Table 58.0%Crown 34.1°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.4%

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: $20,016 AUD|Low: $4,876 AUD|High: $29,372 AUD|Avg: $13,328 AUD|-22.0%
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
October 30, 2026
Retailer 12$4,876 AUD
Retailer 3$5,904 AUD
Retailer 10$6,201 AUD
Retailer 2$6,515 AUD
Retailer 14$7,277 AUD
Retailer 9$7,737 AUD
Retailer 11$9,887 AUD
Retailer 7$10,305 AUD
Retailer 5$12,159 AUD
Retailer 8$12,336 AUD
Retailer 13$12,684 AUD
Retailer 6$16,862 AUD
Retailer 4$18,733 AUD
Brilliant Earth$20,016 AUD

42 data points across 14 retailers

14 retailers$4,876 AUD to $20,016 AUD

A
Cheapest Retailer
-
$4,876 AUD
$3,425 USD
A
Retailer 2
-
$5,904 AUD
HK$32,400 HKD
View
A
Retailer 3
-
$6,201 AUD
$4,356 USD
View
A
Retailer 4
-
$6,515 AUD
£3,603 GBP
View
A
Retailer 5
-
$7,277 AUD
$5,112 USD
View
A
Retailer 6
-
$7,737 AUD
€5,176 EUR
View
Retailer 7
-
$9,887 AUD
$6,945 USD
View
Price last confirmed 13 days ago
B+
Retailer 8
-
$10,305 AUD
ZAR 116,936 ZAR
View
B+
Retailer 9
-
$12,159 AUD
$8,541 USD
View
B+
Retailer 10
-
$12,336 AUD
£6,823 GBP
View
B+
Retailer 11
-
$12,684 AUD
$8,910 USD
View
B
Retailer 12
-
$16,862 AUD
$11,845 USD
View
B
Retailer 13
-
$18,733 AUD
$13,159 USD
View
Most Expensive
B
Brilliant Earth
21144075A · Oct 30
$20,016 AUD
$14,060 USD
View
13 more retailers have this diamond
Prices start from $4,876 AUDSave up to $15,140 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 Round
$4,876 AUD