Oval|Lab Grown|IGI

4.21ct D IF Oval Lab Grown Diamond

EX • D/IF • IGI LG754594340

Certificate IGI LG754594340

Diamond specifications and retailer prices

From $2,777 USD
Save $18,523 USD (87%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $21,300 USD at Brilliant Earth
View at Brilliant Earth

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 14 retailers, with prices from $2,777 to $21,300 at Brilliant Earth, a $18,523 spread on the same certified stone. 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
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594340
Dimensions12.56 × 12.56 × 8.96 mm
L/W Ratio1.00
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 mm12.56 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

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A
Excellent
Excellent quality and great value
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See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Sep 30
Current: $21,300 USD|Low: $1,991 USD|High: $21,300 USD|Avg: $7,642 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 18
October 1, 2026
Retailer 17$2,777 USD
Retailer 5$2,788 USD
Retailer 16$2,890 USD
Retailer 18$3,628 USD
Retailer 4$4,272 USD
Retailer 3$4,288 USD
Retailer 14$4,687 USD
Retailer 10$5,287 USD
Retailer 6$5,751 USD
Retailer 12$6,452 USD
Retailer 13$7,454 USD
Retailer 11$8,152 USD
Retailer 8$8,711 USD
Retailer 7$10,219 USD
Retailer 9$12,753 USD
Retailer 2$16,045 USD
Retailer 15$16,160 USD
Brilliant Earth$21,300 USD

18 data points across 18 retailers

14 retailers$2,777 USD to $21,300 USD

A
Cheapest Retailer
-
$2,777 USD
A
Retailer 2
-
$2,788 USD
View
A
Retailer 3
-
$2,890 USD
View
A
Retailer 4
-
$3,628 USD
View
A
Retailer 5
-
$4,272 USD
View
A
Retailer 6
-
$4,288 USD
View
A
Retailer 7
-
$4,687 USD
€4,464 EUR
View
A
Retailer 8
-
$5,751 USD
View
Price last confirmed 52 days ago
A
Retailer 9
-
$6,452 USD
A$9,926 AUD
View
B+
Retailer 10
-
$7,454 USD
View
B+
Retailer 11
-
$8,152 USD
£6,419 GBP
View
B
Retailer 12
-
$16,045 USD
A$24,684 AUD
View
B
Retailer 13
-
$16,160 USD
View
Most Expensive
B
Brilliant Earth
17680580Y · Sep 29
$21,300 USD
View
13 more retailers have this diamond
Prices start from $2,777 USDSave up to $18,523 USD

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.

A
4.21ct Oval
$2,777 USD