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Round|Lab Grown|IGI

4.27ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG828680589

Shape and cutting style on the report: Round brilliant

Certificate IGI LG828680589

Diamond specifications and retailer prices

From £2,608 GBP
HK$27,300 HKD
As of October 30, 2026
Save £8,057 GBP (76%) 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 LG828680589 or 828680589. Listed at 14 retailers as of October 30, 2026, with prices from £2,608 to £10,665, a £8,057 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 angle35.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828680589
Dimensions10.42 × 10.37 × 6.45 mm
L/W Ratio1.00
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
10.42 mm10.37 mm4.27 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828680589
Side View
Table 56.0%Crown 35.3°Girdle: THN-MEDPavilion 40.8°Culet: NoneDepth 62.0%

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 30
Current: £10,665 GBP|Low: £2,608 GBP|High: £18,554 GBP|Avg: £6,087 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
October 30, 2026
Retailer 13£2,608 GBP
Retailer 2£2,883 GBP
Retailer 10£3,224 GBP
Retailer 8£3,421 GBP
Retailer 11£3,733 GBP
Retailer 6£4,564 GBP
Retailer 3£5,609 GBP
Retailer 12£5,725 GBP
Retailer 7£5,771 GBP
Retailer 5£7,482 GBP
Retailer 4£8,283 GBP
Retailer 9£8,399 GBP
Brilliant Earth£10,665 GBP

33 data points across 13 retailers

14 retailers£2,608 GBP to £10,665 GBP

A
Cheapest Retailer
-
£2,608 GBP
HK$27,300 HKD
A
Retailer 2
-
£2,883 GBP
View
A
Retailer 3
-
£3,224 GBP
$4,320 USD
View
A
Retailer 4
-
£3,421 GBP
€4,365 EUR
View
A
Retailer 5
-
£3,733 GBP
$5,002 USD
View
A
Retailer 6
-
£4,564 GBP
ZAR 98,792 ZAR
View
B+
Retailer 7
-
£5,609 GBP
$7,515 USD
View
B+
Retailer 8
-
£5,725 GBP
$7,671 USD
View
B+
Retailer 9
-
£5,771 GBP
View
B+
Retailer 10
-
£6,374 GBP
$8,540 USD
View
B+
Retailer 11
-
£7,482 GBP
$10,026 USD
View
B+
Retailer 12
-
£8,283 GBP
$11,098 USD
View
Retailer 13
-
£8,399 GBP
A$17,314 AUD
View
Price last confirmed 22 days ago
Most Expensive
B
Brilliant Earth
21581974A · Oct 30
£10,665 GBP
$14,290 USD
View
13 more retailers have this diamond
Prices start from £2,608 GBPSave up to £8,057 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
£2,608 GBP