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Round|Lab Grown|IGI

4.26ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG737568627

Shape and cutting style on the report: Round brilliant

Certificate IGI LG737568627

Diamond specifications and retailer prices

From £1,531 GBP
As of October 30, 2026
Save £8,616 GBP (85%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £10,146 GBP at Blue Nile · As of October 29, 2026
View at Blue Nile

About this 4.26ct lab-grown round diamond

This 4.26ct 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 LG737568627 or 737568627. Listed at 26 retailers as of October 29, 2026, with prices from £1,531 to £10,146, a £8,616 spread on the same certified stone. Blue Nile lists it at £10,146. 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

4.26
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG737568627
Dimensions10.38 × 10.30 × 6.44 mm
L/W Ratio1.01
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
10.38 mm10.30 mm4.26 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG737568627
Side View
Table 56.0%Crown 35.2°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
A+
Exceptional
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 30
Current: £10,053 GBP|Low: £1,526 GBP|High: £17,949 GBP|Avg: £4,166 GBP|-44.0%
Retailer 1
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
October 30, 2026
Retailer 9£1,531 GBP
Retailer 2£1,701 GBP
Retailer 16£1,851 GBP
Retailer 12£1,905 GBP
Retailer 4£1,973 GBP
Retailer 10£2,706 GBP
Retailer 3£2,712 GBP
Retailer 6£2,862 GBP
Retailer 7£2,963 GBP
Retailer 5£3,024 GBP
Retailer 14£3,140 GBP
Retailer 11£4,200 GBP
Retailer 15£4,235 GBP
Retailer 13£5,383 GBP
Retailer 8£8,282 GBP
Retailer 1£10,053 GBP

29 data points across 16 retailers

26 retailers£1,531 GBP to £10,146 GBP

A+
Cheapest Retailer
-
£1,531 GBP
A
Retailer 2
-
£1,701 GBP
$2,279 USD
View
A
Retailer 3
-
£1,851 GBP
$2,480 USD
View
A
Retailer 4
-
£1,905 GBP
$2,552 USD
View
Final sale: no returns
A
Retailer 5
-
£1,973 GBP
$2,644 USD
View
A
Retailer 6
-
£2,086 GBP
$2,795 USD
View
A
Retailer 7
-
£2,398 GBP
HK$25,100 HKD
View
A
Retailer 8
-
£2,706 GBP
View
A
Retailer 9
-
£2,712 GBP
$3,634 USD
View
A
Retailer 10
-
£2,862 GBP
$3,835 USD
View
A
Retailer 11
-
£2,963 GBP
$3,970 USD
View
A
Retailer 12
-
£3,024 GBP
$4,052 USD
View
A
Retailer 13
-
£3,140 GBP
€4,007 EUR
View
A
Retailer 14
-
£3,670 GBP
$4,918 USD
View
A
Retailer 15
-
£4,200 GBP
ZAR 90,921 ZAR
View
Retailer 16
-
£4,235 GBP
A$8,729 AUD
View
Price last confirmed 8 days ago
B+
Retailer 17
-
£5,148 GBP
$6,898 USD
View
B+
Retailer 18
-
£5,269 GBP
$7,060 USD
View
B+
Retailer 19
-
£5,383 GBP
View
B+
Retailer 20
-
£5,571 GBP
$7,465 USD
View
B+
Retailer 21
-
£6,893 GBP
$9,236 USD
View
B+
Retailer 22
-
£6,941 GBP
SGD 12,568 SGD
View
Retailer 23
-
£8,282 GBP
A$17,072 AUD
View
Price last confirmed 25 days ago
B
Retailer 24
-
£10,053 GBP
$13,470 USD
View
B
Retailer 25
-
£10,137 GBP
$13,582 USD
View
Most Expensive
B
Blue Nile
27482224 · Oct 29
£10,146 GBP
$13,595 USD
View
25 more retailers have this diamond
Prices start from £1,531 GBPSave up to £8,616 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+
4.26ct Round
£1,531 GBP