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Radiant|Lab Grown|IGI

6.51ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG617400068

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

Certificate IGI LG617400068

Diamond specifications and retailer prices

From £615 GBP
$824 USD
As of October 30, 2026
Save £3,594 GBP (85%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,209 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 6.51ct lab-grown radiant diamond

This 6.51ct 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 LG617400068 or 617400068. Listed at 21 retailers as of October 30, 2026, with prices from £615 to £4,209, a £3,594 spread on the same certified stone. Brilliant Earth lists it at £4,209. 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

6.51
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.1°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG617400068
Dimensions13.04 × 9.21 × 6.25 mm
L/W Ratio1.42
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
13.04 mm9.21 mm6.51 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG617400068
Side View
Table 65.0%Crown 46.1°Girdle: MediumPavilion 35.4°Culet: NoneDepth 67.9%

Caratlytics Score

How it works →
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 30
Current: £4,209 GBP|Low: £608 GBP|High: £4,209 GBP|Avg: £1,484 GBP
Brilliant Earth
Retailer 2
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Retailer 21
November 1, 2026
Retailer 4£615 GBP
Retailer 19£669 GBP
Retailer 9£689 GBP
Retailer 6£713 GBP
Retailer 21£713 GBP
Retailer 3£768 GBP
Retailer 18£843 GBP
Retailer 13£1,086 GBP
Retailer 7£1,092 GBP
Retailer 10£1,149 GBP
Retailer 15£1,173 GBP
Retailer 16£1,322 GBP
Retailer 17£1,380 GBP
Retailer 20£1,640 GBP
Retailer 8£1,912 GBP
Retailer 5£2,005 GBP
Retailer 12£2,232 GBP
Retailer 11£2,266 GBP
Retailer 14£2,470 GBP
Retailer 2£2,674 GBP
Brilliant Earth£4,209 GBP

36 data points across 21 retailers

21 retailers£615 GBP to £4,209 GBP

A
Cheapest Retailer
-
£615 GBP
$824 USD
A
Retailer 2
-
£669 GBP
$896 USD
View
A
Retailer 3
-
£689 GBP
$923 USD
View
Final sale: no returns
A
Retailer 4
-
£713 GBP
$956 USD
View
Retailer 5
-
£713 GBP
$956 USD
View
Price last confirmed 15 days ago
Retailer 6
-
£768 GBP
View
Price last confirmed 16 days ago
A
Retailer 7
-
£843 GBP
$1,130 USD
View
A
Retailer 8
-
£1,086 GBP
View
A
Retailer 9
-
£1,092 GBP
$1,463 USD
View
B+
Retailer 10
-
£1,149 GBP
$1,539 USD
View
A
Retailer 11
-
£1,173 GBP
€1,497 EUR
View
A
Retailer 12
-
£1,322 GBP
A$2,725 AUD
View
A
Retailer 13
-
£1,380 GBP
ZAR 29,874 ZAR
View
B+
Retailer 14
-
£1,640 GBP
$2,197 USD
View
B+
Retailer 15
-
£1,912 GBP
$2,562 USD
View
B+
Retailer 16
-
£2,005 GBP
$2,687 USD
View
B+
Retailer 17
-
£2,232 GBP
$2,990 USD
View
Retailer 18
-
£2,266 GBP
$3,036 USD
View
Price last confirmed 21 days ago
B+
Retailer 19
-
£2,470 GBP
$3,309 USD
View
B+
Retailer 20
-
£2,674 GBP
View
Most Expensive
B
Brilliant Earth
9065431A · Oct 31
£4,209 GBP
$5,640 USD
View
20 more retailers have this diamond
Prices start from £615 GBPSave up to £3,594 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
6.51ct Radiant
£615 GBP