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Round|Lab Grown|IGI

4.25ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG810620388

Shape and cutting style on the report: Round brilliant

Certificate IGI LG810620388

Diamond specifications and retailer prices

From $4,803 AUD
$3,374 USD
As of October 29, 2026
Save $16,195 AUD (77%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $20,998 AUD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 4.25ct lab-grown round diamond

This 4.25ct 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 LG810620388 or 810620388. Listed at 21 retailers as of October 29, 2026, with prices from $4,803 to $20,998, a $16,195 spread on the same certified stone. Brilliant Earth lists it at $20,998. 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

4.25
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG810620388
Dimensions10.39 × 10.45 × 6.34 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
HEARTS & ARROWS 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
10.39 mm10.45 mm4.25 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG810620388
Side View
Table 58.0%Crown 34.6°Girdle: THN-MEDPavilion 40.6°Culet: NoneDepth 60.8%

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 29
Current: $20,998 AUD|Low: $4,803 AUD|High: $26,920 AUD|Avg: $10,352 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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
October 31, 2026
Retailer 14$4,803 AUD
Retailer 8$5,226 AUD
Retailer 10$5,380 AUD
Retailer 5$5,464 AUD
Retailer 4$5,572 AUD
Retailer 12$5,572 AUD
Retailer 20$5,573 AUD
Retailer 17$6,487 AUD
Retailer 7$6,902 AUD
Retailer 3$6,963 AUD
Retailer 13$7,008 AUD
Retailer 15$7,401 AUD
Retailer 21$7,998 AUD
Retailer 2$9,842 AUD
Retailer 16$11,859 AUD
Retailer 9$13,957 AUD
Retailer 18$14,200 AUD
Retailer 6$15,462 AUD
Retailer 19$18,771 AUD
Retailer 11$19,555 AUD
Brilliant Earth$20,998 AUD

32 data points across 21 retailers

21 retailers$4,803 AUD to $20,998 AUD

A
Cheapest Retailer
-
$4,803 AUD
$3,374 USD
A
Retailer 2
-
$5,226 AUD
$3,671 USD
View
A
Retailer 3
-
$5,380 AUD
$3,779 USD
View
Final sale: no returns
A
Retailer 4
-
$5,464 AUD
$3,838 USD
View
Retailer 5
-
$5,572 AUD
$3,914 USD
View
Price last confirmed 18 days ago
A
Retailer 6
-
$5,572 AUD
$3,914 USD
View
A
Retailer 7
-
$5,573 AUD
$3,915 USD
View
A
Retailer 8
-
$6,487 AUD
HK$35,600 HKD
View
A
Retailer 9
-
$6,902 AUD
$4,848 USD
View
A
Retailer 10
-
$6,963 AUD
$4,891 USD
View
A
Retailer 11
-
$7,008 AUD
$4,923 USD
View
A
Retailer 12
-
$7,401 AUD
£4,094 GBP
View
A
Retailer 13
-
$7,998 AUD
$5,618 USD
View
B+
Retailer 14
-
$9,842 AUD
€6,584 EUR
View
B+
Retailer 15
-
$11,859 AUD
ZAR 134,572 ZAR
View
B+
Retailer 16
-
$13,957 AUD
$9,804 USD
View
B
Retailer 17
-
$14,200 AUD
£7,854 GBP
View
B+
Retailer 18
-
$15,462 AUD
$10,861 USD
View
B+
Retailer 19
-
$18,771 AUD
SGD 17,818 SGD
View
B
Retailer 20
-
$19,555 AUD
$13,736 USD
View
Most Expensive
B
Brilliant Earth
20726621A · Oct 30
$20,998 AUD
$14,750 USD
View
20 more retailers have this diamond
Prices start from $4,803 AUDSave up to $16,195 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
4.25ct Round
$4,803 AUD