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Oval|Lab Grown|IGI

4.21ct D IF Oval Lab Grown Diamond

EX • D/IF • IGI LG754594340

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG754594340

Diamond specifications and retailer prices

From $3,237 AUD
$2,274 USD
As of October 29, 2026
Save $19,380 AUD (86%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $22,617 AUD at Novita Diamonds · As of November 1, 2026
View at Novita Diamonds

About this 4.21ct lab-grown oval diamond

This 4.21ct lab-grown oval sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754594340 or 754594340. Listed at 17 retailers as of October 29, 2026, with prices from $3,237 to $22,617, a $19,380 spread on the same certified stone. Novita Diamonds lists it at $22,617. 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

4.21
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594340
Dimensions12.56 × 8.96 × 5.76 mm
L/W Ratio1.40
Girdle conditionFaceted
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
12.56 mm8.96 mm4.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594340
Side View
Table 56.0%Crown 36°Girdle: STK-THKPavilion 40.2°Culet: NoneDepth 64.3%

Caratlytics Score

How it works →
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 29
Current: $22,617 AUD|Low: $3,212 AUD|High: $30,323 AUD|Avg: $9,444 AUD|+0.4%
Novita Diamonds
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
November 1, 2026
Retailer 15$3,237 AUD
Retailer 10$3,522 AUD
Retailer 12$3,839 AUD
Retailer 8$3,969 AUD
Retailer 16$3,986 AUD
Retailer 5$5,697 AUD
Retailer 11$5,754 AUD
Retailer 6$5,889 AUD
Retailer 14$6,094 AUD
Retailer 2$6,737 AUD
Retailer 9$8,187 AUD
Retailer 7$9,190 AUD
Retailer 4$10,281 AUD
Retailer 17$11,157 AUD
Retailer 13$16,172 AUD
Retailer 3$22,265 AUD
Novita Diamonds$22,617 AUD

36 data points across 17 retailers

17 retailers$3,237 AUD to $22,617 AUD

A
Cheapest Retailer
-
$3,237 AUD
$2,274 USD
A
Retailer 2
-
$3,522 AUD
$2,474 USD
View
A
Retailer 3
-
$3,839 AUD
$2,697 USD
View
A
Retailer 4
-
$3,969 AUD
$2,788 USD
View
Final sale: no returns
A
Retailer 5
-
$3,986 AUD
$2,800 USD
View
A
Retailer 6
-
$5,697 AUD
$4,002 USD
View
A
Retailer 7
-
$5,754 AUD
$4,042 USD
View
A
Retailer 8
-
$5,889 AUD
$4,137 USD
View
A
Retailer 9
-
$6,094 AUD
$4,281 USD
View
A
Retailer 10
-
$6,737 AUD
€4,507 EUR
View
Retailer 11
-
$8,187 AUD
$5,751 USD
View
Price last confirmed 83 days ago
Retailer 12
-
$9,190 AUD
View
Price last confirmed 9 days ago
B+
Retailer 13
-
$10,281 AUD
$7,222 USD
View
B+
Retailer 14
-
$11,157 AUD
£6,171 GBP
View
B
Retailer 15
-
$16,172 AUD
$11,360 USD
View
B
Retailer 16
-
$22,265 AUD
$15,640 USD
View
Most Expensive
B
Novita Diamonds
cert_754594340 · Nov 1
$22,617 AUD
View
16 more retailers have this diamond
Prices start from $3,237 AUDSave up to $19,380 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
4.21ct Oval
$3,237 AUD