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Round|Lab Grown|IGI

4.18ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG679506702

Shape and cutting style on the report: Round brilliant

Certificate IGI LG679506702

Diamond specifications and retailer prices

From £1,289 GBP
As of October 30, 2026
Save £4,531 GBP (78%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £5,820 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 4.18ct lab-grown round diamond

This 4.18ct 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 LG679506702 or 679506702. Listed at 18 retailers as of October 30, 2026, with prices from £1,289 to £5,820, a £4,531 spread on the same certified stone. Taylor and Hart lists it at £5,820. 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

4.18
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG679506702
Dimensions10.23 × 10.30 × 6.39 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
10.23 mm10.30 mm4.18 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG679506702
Side View
Table 57.0%Crown 34.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.2%

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: £1,564 GBP|Low: £1,285 GBP|High: £5,820 GBP|Avg: £2,711 GBP|-7.1%
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
Retailer 17
Taylor and Hart
October 30, 2026
Retailer 10£1,289 GBP
Retailer 2£1,433 GBP
Retailer 9£1,559 GBP
Retailer 1£1,564 GBP
Retailer 4£1,662 GBP
Retailer 8£1,662 GBP
Retailer 13£1,787 GBP
Retailer 5£1,803 GBP
Retailer 11£2,276 GBP
Retailer 14£2,399 GBP
Retailer 17£2,729 GBP
Retailer 6£3,116 GBP
Retailer 3£3,486 GBP
Retailer 12£3,538 GBP
Retailer 16£3,567 GBP
Retailer 7£4,479 GBP
Retailer 15£4,753 GBP
Taylor and Hart£5,820 GBP

34 data points across 18 retailers

18 retailers£1,289 GBP to £5,820 GBP

A+
Cheapest Retailer
-
£1,289 GBP
A
Retailer 2
-
£1,433 GBP
$1,908 USD
View
A
Retailer 3
-
£1,559 GBP
$2,076 USD
View
A
Retailer 4
-
£1,564 GBP
$2,083 USD
View
Final sale: no returns
A
Retailer 5
-
£1,662 GBP
$2,213 USD
View
Retailer 6
-
£1,662 GBP
$2,213 USD
View
Price last confirmed 19 days ago
A
Retailer 7
-
£1,787 GBP
$2,380 USD
View
A
Retailer 8
-
£1,803 GBP
$2,401 USD
View
A
Retailer 9
-
£2,276 GBP
View
A
Retailer 10
-
£2,399 GBP
$3,195 USD
View
A
Retailer 11
-
£2,729 GBP
$3,634 USD
View
A
Retailer 12
-
£3,116 GBP
$4,149 USD
View
A
Retailer 13
-
£3,486 GBP
$4,642 USD
View
A
Retailer 14
-
£3,538 GBP
ZAR 76,110 ZAR
View
Retailer 15
-
£3,567 GBP
A$7,307 AUD
View
Price last confirmed 7 days ago
A
Retailer 16
-
£4,479 GBP
$5,964 USD
View
B+
Retailer 17
-
£4,753 GBP
View
Most Expensive
B+
Taylor and Hart
8Y0X2RH · Oct 30
£5,820 GBP
$7,751 USD
View
17 more retailers have this diamond
Prices start from £1,289 GBPSave up to £4,531 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+
4.18ct Round
£1,289 GBP