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Round|Lab Grown|IGI

4.27ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG799670315

Shape and cutting style on the report: Round brilliant

Certificate IGI LG799670315

Diamond specifications and retailer prices

From £2,241 GBP
$3,003 USD
As of October 30, 2026
Save £8,424 GBP (79%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £10,665 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 4.27ct lab-grown round diamond

This 4.27ct lab-grown round 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 LG799670315 or 799670315. Listed at 14 retailers as of October 30, 2026, with prices from £2,241 to £10,665, a £8,424 spread on the same certified stone. Brilliant Earth lists it at £10,665. 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

4.27
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799670315
Dimensions10.31 × 10.41 × 6.44 mm
L/W Ratio1.01
Girdle conditionFaceted
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
10.31 mm10.41 mm4.27 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799670315
Side View
Table 57.0%Crown 35.8°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.2%

Caratlytics Score

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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 30
Current: £10,665 GBP|Low: £2,241 GBP|High: £18,554 GBP|Avg: £5,726 GBP|-42.5%
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
October 30, 2026
Retailer 14£2,241 GBP
Retailer 3£2,608 GBP
Retailer 2£2,883 GBP
Retailer 10£3,224 GBP
Retailer 9£3,421 GBP
Retailer 12£3,733 GBP
Retailer 7£4,564 GBP
Retailer 4£5,609 GBP
Retailer 13£5,725 GBP
Retailer 8£5,771 GBP
Retailer 6£7,482 GBP
Retailer 5£8,283 GBP
Retailer 11£8,415 GBP
Brilliant Earth£10,665 GBP

41 data points across 14 retailers

14 retailers£2,241 GBP to £10,665 GBP

A
Cheapest Retailer
-
£2,241 GBP
$3,003 USD
A
Retailer 2
-
£2,608 GBP
HK$27,300 HKD
View
A
Retailer 3
-
£2,883 GBP
View
A
Retailer 4
-
£3,224 GBP
$4,320 USD
View
A
Retailer 5
-
£3,421 GBP
€4,365 EUR
View
A
Retailer 6
-
£3,733 GBP
$5,002 USD
View
A
Retailer 7
-
£4,564 GBP
ZAR 98,792 ZAR
View
B+
Retailer 8
-
£5,609 GBP
$7,515 USD
View
B+
Retailer 9
-
£5,725 GBP
$7,671 USD
View
B+
Retailer 10
-
£5,771 GBP
View
B+
Retailer 11
-
£7,482 GBP
$10,026 USD
View
B
Retailer 12
-
£8,283 GBP
$11,098 USD
View
Retailer 13
-
£8,415 GBP
A$17,347 AUD
View
Price last confirmed 25 days ago
Most Expensive
B
Brilliant Earth
20306691A · Oct 30
£10,665 GBP
$14,290 USD
View
13 more retailers have this diamond
Prices start from £2,241 GBPSave up to £8,424 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
4.27ct Round
£2,241 GBP