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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 $4,035 NZD
$2,274 USD
As of October 29, 2026
Save $24,154 NZD (86%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $28,189 NZD 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 $4,035 to $28,189, a $24,154 spread on the same certified stone. Novita Diamonds lists it at $28,189. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $28,189 NZD|Low: $4,003 NZD|High: $37,793 NZD|Avg: $11,771 NZD|+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$4,035 NZD
Retailer 10$4,390 NZD
Retailer 12$4,785 NZD
Retailer 8$4,947 NZD
Retailer 16$4,968 NZD
Retailer 5$7,101 NZD
Retailer 11$7,172 NZD
Retailer 6$7,340 NZD
Retailer 14$7,596 NZD
Retailer 2$8,397 NZD
Retailer 9$10,204 NZD
Retailer 7$11,455 NZD
Retailer 4$12,813 NZD
Retailer 17$13,905 NZD
Retailer 13$20,156 NZD
Retailer 3$27,750 NZD
Novita Diamonds$28,189 NZD

36 data points across 17 retailers

17 retailers$4,035 NZD to $28,189 NZD

A
Cheapest Retailer
-
$4,035 NZD
$2,274 USD
A
Retailer 2
-
$4,390 NZD
$2,474 USD
View
A
Retailer 3
-
$4,785 NZD
$2,697 USD
View
A
Retailer 4
-
$4,947 NZD
$2,788 USD
View
Final sale: no returns
A
Retailer 5
-
$4,968 NZD
$2,800 USD
View
A
Retailer 6
-
$7,101 NZD
$4,002 USD
View
A
Retailer 7
-
$7,172 NZD
$4,042 USD
View
A
Retailer 8
-
$7,340 NZD
$4,137 USD
View
A
Retailer 9
-
$7,596 NZD
$4,281 USD
View
A
Retailer 10
-
$8,397 NZD
€4,507 EUR
View
Retailer 11
-
$10,204 NZD
$5,751 USD
View
Price last confirmed 83 days ago
Retailer 12
-
$11,455 NZD
A$9,932 AUD
View
Price last confirmed 9 days ago
B+
Retailer 13
-
$12,813 NZD
$7,222 USD
View
B+
Retailer 14
-
$13,905 NZD
£6,171 GBP
View
B
Retailer 15
-
$20,156 NZD
$11,360 USD
View
B
Retailer 16
-
$27,750 NZD
$15,640 USD
View
Most Expensive
B
Novita Diamonds
cert_754594340 · Nov 1
$28,189 NZD
A$24,442 AUD
View
16 more retailers have this diamond
Prices start from $4,035 NZDSave up to $24,154 NZD

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
$4,035 NZD