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Radiant|Lab Grown|IGI

6.18ct G VS1 Radiant Lab Grown Diamond

EX • G/VS1 • IGI LG839604468

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

Certificate IGI LG839604468

Diamond specifications and retailer prices

From £595 GBP
$798 USD
As of November 1, 2026
Save £1,249 GBP (68%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £4,337 GBP at Brilliant Earth · As of October 1, 2026
View at Brilliant Earth

About this 6.18ct lab-grown radiant diamond

This 6.18ct lab-grown radiant sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG839604468 or 839604468. Listed at 4 retailers as of November 1, 2026, with a 210% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

6.18
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839604468
Dimensions12.82 × 9.10 × 6.15 mm
L/W Ratio1.41
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.82 mm9.10 mm6.18 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839604468
Side View
Table 67.0%Crown 45°Girdle: MED-STKPavilion 34.8°Culet: NoneDepth 67.6%

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: Nov 1
Current: £1,844 GBP|Low: £595 GBP|High: £1,844 GBP|Avg: £950 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 2£595 GBP
Retailer 3£811 GBP
Retailer 4£1,021 GBP
Retailer 1£1,844 GBP

5 data points across 4 retailers

4 retailers£595 GBP to £1,844 GBP

A
Cheapest Retailer
-
£595 GBP
$798 USD
Final sale: no returns
B+
Retailer 2
-
£811 GBP
$1,088 USD
View
B+
Retailer 3
-
£1,844 GBP
$2,474 USD
View
Most Expensive
Brilliant Earth
21582941A · Oct 1
£4,337 GBP
$5,820 USD
View
Price last confirmed 32 days ago
3 more retailers have this diamond
Prices start from £595 GBPSave up to £1,249 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
6.18ct Radiant
£595 GBP