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Oval|Lab Grown|IGI

4.21ct D IF Oval Lab Grown Diamond

EX • D/IF • IGI LG793643349

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG793643349

Diamond specifications and retailer prices

From £2,419 GBP
$3,241 USD
As of November 1, 2026
Save £6,320 GBP (72%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £12,007 GBP at Novita Diamonds · As of October 8, 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 LG793643349 or 793643349. Listed at 11 retailers as of October 31, 2026, with a 261% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle35.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG793643349
Dimensions12.98 × 9.21 × 5.73 mm
L/W Ratio1.41
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
12.98 mm9.21 mm4.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG793643349
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 62.2%

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: Nov 1
Current: £12,007 GBP|Low: £2,394 GBP|High: £12,007 GBP|Avg: £5,454 GBP|+1.6%
Novita Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 7£2,419 GBP
Retailer 4£2,761 GBP
Retailer 2£3,187 GBP
Retailer 6£3,524 GBP
Retailer 3£3,774 GBP
Retailer 8£4,188 GBP
Retailer 5£6,377 GBP
Retailer 10£8,291 GBP
Retailer 9£8,739 GBP
Novita Diamonds£12,007 GBP

41 data points across 10 retailers

11 retailers£2,419 GBP to £8,739 GBP

A
Cheapest Retailer
-
£2,419 GBP
$3,241 USD
A
Retailer 2
-
£2,761 GBP
HK$28,900 HKD
View
A
Retailer 3
-
£3,187 GBP
View
A
Retailer 4
-
£3,524 GBP
$4,722 USD
View
A
Retailer 5
-
£3,774 GBP
€4,816 EUR
View
A
Retailer 6
-
£4,188 GBP
$5,611 USD
View
Retailer 7
-
£5,234 GBP
$7,013 USD
View
Price last confirmed 96 days ago
B+
Retailer 8
-
£6,377 GBP
View
B
Retailer 9
-
£8,291 GBP
$11,109 USD
View
B
Retailer 10
-
£8,739 GBP
$11,709 USD
View
Most Expensive
Novita Diamonds
cert_793643349 · Oct 8
£12,007 GBP
A$24,750 AUD
View
Price last confirmed 23 days ago
10 more retailers have this diamond
Prices start from £2,419 GBPSave up to £6,320 GBP

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
£2,419 GBP