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Radiant|Lab Grown|IGI

8.18ct H VS1 Radiant Lab Grown Diamond

ID • H/VS1 • IGI LG575374168

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG575374168

Diamond specifications and retailer prices

From £855 GBP
$1,145 USD
As of October 30, 2026
Save £3,906 GBP (82%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £4,760 GBP at With Clarity · As of October 31, 2026
View at With Clarity

About this 8.18ct lab-grown radiant diamond

This 8.18ct lab-grown radiant sits in the over five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG575374168 or 575374168. Listed at 22 retailers as of October 30, 2026, with prices from £855 to £4,760, a £3,906 spread on the same certified stone. With Clarity lists it at £4,760. 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

8.18
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.2°
Pavilion angle32.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG575374168
Dimensions13.51 × 9.63 × 6.90 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
13.51 mm9.63 mm8.18 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG575374168
Side View
Table 64.0%Crown 41.2°Girdle: Slightly ThickPavilion 32.8°Culet: NoneDepth 71.7%

Caratlytics Score

How it works →
A
Excellent
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: £1,500 GBP|Low: £820 GBP|High: £4,799 GBP|Avg: £2,063 GBP|-6.8%
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
Retailer 18
Retailer 19
With Clarity
October 31, 2026
Retailer 2£855 GBP
Retailer 7£929 GBP
Retailer 3£956 GBP
Retailer 5£991 GBP
Retailer 8£991 GBP
Retailer 17£1,119 GBP
Retailer 14£1,183 GBP
Retailer 9£1,389 GBP
Retailer 18£1,411 GBP
Retailer 1£1,500 GBP
Retailer 16£1,662 GBP
Retailer 13£1,773 GBP
Retailer 12£1,836 GBP
Retailer 6£1,858 GBP
Retailer 11£2,418 GBP
Retailer 10£2,730 GBP
Retailer 19£2,995 GBP
Retailer 15£3,201 GBP
Retailer 4£4,597 GBP
With Clarity£4,665 GBP

41 data points across 20 retailers

22 retailers£855 GBP to £4,760 GBP

A
Cheapest Retailer
-
£855 GBP
$1,145 USD
A
Retailer 2
-
£929 GBP
$1,245 USD
View
A
Retailer 3
-
£956 GBP
$1,281 USD
View
Final sale: no returns
A
Retailer 4
-
£991 GBP
$1,328 USD
View
Retailer 5
-
£991 GBP
$1,328 USD
View
Price last confirmed 14 days ago
A
Retailer 6
-
£1,119 GBP
$1,500 USD
View
A
Retailer 7
-
£1,183 GBP
View
A
Retailer 8
-
£1,389 GBP
$1,861 USD
View
B+
Retailer 9
-
£1,411 GBP
$1,890 USD
View
A
Retailer 10
-
£1,500 GBP
€1,914 EUR
View
A
Retailer 11
-
£1,662 GBP
ZAR 35,975 ZAR
View
A
Retailer 12
-
£1,773 GBP
$2,375 USD
View
B+
Retailer 13
-
£1,836 GBP
A$3,785 AUD
View
A
Retailer 14
-
£1,858 GBP
$2,489 USD
View
B+
Retailer 15
-
£2,418 GBP
$3,239 USD
View
B+
Retailer 16
-
£2,433 GBP
$3,260 USD
View
B+
Retailer 17
-
£2,730 GBP
View
B+
Retailer 18
-
£2,995 GBP
$4,013 USD
View
B+
Retailer 19
-
£3,201 GBP
View
B
Retailer 20
-
£3,468 GBP
$4,647 USD
View
B
Retailer 21
-
£4,597 GBP
$6,160 USD
View
Most Expensive
B
With Clarity
575374168 · Oct 31
£4,760 GBP
$6,378 USD
View
21 more retailers have this diamond
Prices start from £855 GBPSave up to £3,906 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
8.18ct Radiant
£855 GBP