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Radiant|Lab Grown|IGI

6.18ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG626448502

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

Certificate IGI LG626448502

Diamond specifications and retailer prices

From £627 GBP
$840 USD
As of November 2, 2026
Save £3,373 GBP (84%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £4,000 GBP at Brilliant Earth · As of October 31, 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 LG626448502 or 626448502. Listed at 24 retailers as of October 31, 2026, with prices from £627 to £4,000, a £3,373 spread on the same certified stone. Brilliant Earth lists it at £4,000. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626448502
Dimensions13.39 × 9.04 × 5.95 mm
L/W Ratio1.48
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
13.39 mm9.04 mm6.18 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626448502
Side View
Table 61.0%Crown 44°Girdle: MED-STKPavilion 34.8°Culet: NoneDepth 65.8%

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: Nov 2
Current: £4,000 GBP|Low: £602 GBP|High: £4,000 GBP|Avg: £1,407 GBP
Brilliant Earth
Retailer 2
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Retailer 19
November 2, 2026
Retailer 5£627 GBP
Retailer 9£681 GBP
Retailer 6£701 GBP
Retailer 7£727 GBP
Retailer 10£727 GBP
Retailer 18£782 GBP
Retailer 19£858 GBP
Retailer 17£1,041 GBP
Retailer 11£1,095 GBP
Retailer 13£1,103 GBP
Retailer 2£1,117 GBP
Retailer 15£1,347 GBP
Retailer 16£1,406 GBP
Retailer 14£1,486 GBP
Retailer 8£2,043 GBP
Retailer 4£2,274 GBP
Retailer 3£2,302 GBP
Retailer 12£2,724 GBP
Brilliant Earth£4,000 GBP

44 data points across 19 retailers

24 retailers£627 GBP to £4,000 GBP

A
Cheapest Retailer
-
£627 GBP
$840 USD
A
Retailer 2
-
£681 GBP
$913 USD
View
A
Retailer 3
-
£701 GBP
$939 USD
View
Final sale: no returns
A
Retailer 4
-
£727 GBP
$974 USD
View
Retailer 5
-
£727 GBP
$974 USD
View
Price last confirmed 16 days ago
Retailer 6
-
£782 GBP
View
Price last confirmed 16 days ago
A
Retailer 7
-
£858 GBP
$1,150 USD
View
B+
Retailer 8
-
£1,041 GBP
$1,395 USD
View
A
Retailer 9
-
£1,095 GBP
$1,467 USD
View
A
Retailer 10
-
£1,103 GBP
€1,407 EUR
View
A
Retailer 11
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£1,117 GBP
View
A
Retailer 12
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£1,347 GBP
A$2,776 AUD
View
A
Retailer 13
-
£1,406 GBP
ZAR 30,441 ZAR
View
A
Retailer 14
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£1,486 GBP
$1,991 USD
View
B+
Retailer 15
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£1,749 GBP
$2,344 USD
View
B+
Retailer 16
-
£1,766 GBP
$2,366 USD
View
B+
Retailer 17
-
£2,013 GBP
View
B+
Retailer 18
-
£2,043 GBP
$2,738 USD
View
B+
Retailer 19
-
£2,274 GBP
$3,047 USD
View
B+
Retailer 20
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£2,302 GBP
$3,084 USD
View
B+
Retailer 21
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£2,519 GBP
$3,375 USD
View
B+
Retailer 22
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£2,724 GBP
View
B
Retailer 23
-
£3,476 GBP
$4,658 USD
View
Most Expensive
B
Brilliant Earth
9517148A · Oct 31
£4,000 GBP
$5,360 USD
View
23 more retailers have this diamond
Prices start from £627 GBPSave up to £3,373 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
£627 GBP