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Round|Lab Grown|IGI

4.26ct D IF Round Lab Grown Diamond

EX • D/IF • IGI LG738511286

Shape and cutting style on the report: Round brilliant

Certificate IGI LG738511286

Diamond specifications and retailer prices

From £1,670 GBP
$2,238 USD
As of October 29, 2026
Save £9,823 GBP (85%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £11,493 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

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 LG738511286 or 738511286. Listed at 23 retailers as of October 29, 2026, with prices from £1,670 to £11,493, a £9,823 spread on the same certified stone. Do Amore Diamonds lists it at £11,493. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG738511286
Dimensions10.55 × 10.48 × 6.32 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
10.55 mm10.48 mm4.26 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG738511286
Side View
Table 58.0%Crown 32.4°Girdle: MediumPavilion 41°Culet: NoneDepth 60.1%

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 29
Current: £11,493 GBP|Low: £1,604 GBP|High: £17,845 GBP|Avg: £4,705 GBP|-10.6%
Do Amore Diamonds
Retailer 2
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October 30, 2026
Retailer 23£1,670 GBP
Retailer 22£1,817 GBP
Retailer 18£1,870 GBP
Retailer 4£1,938 GBP
Retailer 11£2,054 GBP
Retailer 6£2,060 GBP
Retailer 12£2,656 GBP
Retailer 8£2,819 GBP
Retailer 13£2,876 GBP
Retailer 3£2,941 GBP
Retailer 5£3,038 GBP
Retailer 7£3,217 GBP
Retailer 20£3,413 GBP
Retailer 17£4,553 GBP
Retailer 21£4,590 GBP
Retailer 10£5,174 GBP
Retailer 9£5,412 GBP
Retailer 15£5,596 GBP
Retailer 19£5,758 GBP
Retailer 14£7,465 GBP
Retailer 16£7,696 GBP
Retailer 2£9,993 GBP
Do Amore Diamonds£11,493 GBP

35 data points across 23 retailers

23 retailers£1,670 GBP to £11,493 GBP

A
Cheapest Retailer
-
£1,670 GBP
$2,238 USD
A
Retailer 2
-
£1,817 GBP
$2,435 USD
View
A
Retailer 3
-
£1,870 GBP
$2,506 USD
View
Final sale: no returns
A
Retailer 4
-
£1,938 GBP
$2,597 USD
View
A
Retailer 5
-
£2,054 GBP
$2,752 USD
View
A
Retailer 6
-
£2,060 GBP
$2,760 USD
View
A
Retailer 7
-
£2,656 GBP
HK$27,800 HKD
View
A
Retailer 8
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£2,819 GBP
$3,777 USD
View
A
Retailer 9
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£2,876 GBP
View
A
Retailer 10
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£2,941 GBP
$3,940 USD
View
A
Retailer 11
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£3,038 GBP
$4,070 USD
View
A
Retailer 12
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£3,217 GBP
$4,310 USD
View
A
Retailer 13
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£3,413 GBP
€4,355 EUR
View
A
Retailer 14
-
£4,553 GBP
ZAR 98,564 ZAR
View
Retailer 15
-
£4,590 GBP
A$9,462 AUD
View
Price last confirmed 8 days ago
B+
Retailer 16
-
£5,174 GBP
$6,933 USD
View
B+
Retailer 17
-
£5,412 GBP
$7,251 USD
View
B+
Retailer 18
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£5,596 GBP
$7,498 USD
View
B+
Retailer 19
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£5,758 GBP
View
B+
Retailer 20
-
£7,465 GBP
$10,003 USD
View
B
Retailer 21
-
£7,696 GBP
SGD 13,935 SGD
View
B
Retailer 22
-
£9,993 GBP
$13,390 USD
View
Most Expensive
B
Do Amore Diamonds
27-6FF8AF87F · Oct 29
£11,493 GBP
$15,400 USD
View
22 more retailers have this diamond
Prices start from £1,670 GBPSave up to £9,823 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
£1,670 GBP