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Round|Lab Grown|IGI

6.61ct G VS1 Round Lab Grown Diamond

EX • G/VS1 • IGI LG840639131

Shape and cutting style on the report: Round brilliant

Certificate IGI LG840639131

Diamond specifications and retailer prices

From £763 GBP
$1,023 USD
As of October 31, 2026
Save £1,406 GBP (65%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £9,784 GBP at Brilliant Earth · As of October 1, 2026
View at Brilliant Earth

About this 6.61ct lab-grown round diamond

This 6.61ct 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 LG840639131 or 840639131. Listed at 4 retailers as of October 30, 2026, with a 184% 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

6.61
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840639131
Dimensions11.95 × 11.99 × 7.38 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.95 mm11.99 mm6.61 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840639131
Side View
Table 60.0%Crown 35°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.7%

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 31
Current: £9,784 GBP|Low: £763 GBP|High: £9,784 GBP|Avg: £3,431 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 27, 2026
Retailer 3£763 GBP
Retailer 4£1,036 GBP
Retailer 5£1,235 GBP
Retailer 2£2,170 GBP
Brilliant Earth£9,784 GBP

7 data points across 5 retailers

4 retailers£763 GBP to £2,170 GBP

A
Cheapest Retailer
-
£763 GBP
$1,023 USD
Final sale: no returns
B+
Retailer 2
-
£1,036 GBP
$1,388 USD
View
B+
Retailer 3
-
£2,170 GBP
$2,907 USD
View
Most Expensive
Brilliant Earth
21613482A · Oct 1
£9,784 GBP
$13,110 USD
View
Price under review
3 more retailers have this diamond
Prices start from £763 GBPSave up to £1,406 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
6.61ct Round
£763 GBP