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Round|Lab Grown|IGI

6.59ct G VS1 Round Lab Grown Diamond

ID • G/VS1 • IGI LG821638661

Shape and cutting style on the report: Round brilliant

Certificate IGI LG821638661

Diamond specifications and retailer prices

From £1,259 GBP
As of November 1, 2026
Save £1,798 GBP (59%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,058 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 6.59ct lab-grown round diamond

This 6.59ct lab-grown round 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 LG821638661 or 821638661. Listed at 6 retailers as of October 31, 2026, with prices from £1,259 to £3,058, a £1,798 spread on the same certified stone. Taylor and Hart lists it at £3,058. 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

6.59
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821638661
Dimensions12.01 × 12.10 × 7.37 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.01 mm12.10 mm6.59 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821638661
Side View
Table 59.0%Crown 34.2°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.1%

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: Nov 1
Current: £1,259 GBP|Low: £984 GBP|High: £3,708 GBP|Avg: £1,885 GBP|-16.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Taylor and Hart
November 1, 2026
Retailer 6£984 GBP
Retailer 1£1,259 GBP
Retailer 4£1,363 GBP
Retailer 5£1,386 GBP
Retailer 2£2,123 GBP
Retailer 3£2,960 GBP
Taylor and Hart£3,058 GBP

42 data points across 7 retailers

6 retailers£1,259 GBP to £3,058 GBP

A
Cheapest Retailer
-
£1,259 GBP
A
Retailer 2
-
£1,363 GBP
€1,739 EUR
View
B+
Retailer 3
-
£1,386 GBP
$1,857 USD
View
B+
Retailer 4
-
£2,123 GBP
$2,845 USD
View
B
Retailer 5
-
£2,960 GBP
View
Most Expensive
B
Taylor and Hart
HTNAMKB · Oct 31
£3,058 GBP
$4,097 USD
View
5 more retailers have this diamond
Prices start from £1,259 GBPSave up to £1,798 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
6.59ct Round
£1,259 GBP