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Oval|Lab Grown|IGI

6.65ct G VS1 Oval Lab Grown Diamond

ID • G/VS1 • IGI LG598388125

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG598388125

Diamond specifications and retailer prices

From £679 GBP
$911 USD
As of November 1, 2026
Save £3,576 GBP (84%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,255 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 6.65ct lab-grown oval diamond

This 6.65ct lab-grown oval 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 LG598388125 or 598388125. Listed at 20 retailers as of November 1, 2026, with prices from £679 to £4,255, a £3,576 spread on the same certified stone. Brilliant Earth lists it at £4,255. 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

6.65
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598388125
Dimensions14.94 × 10.69 × 6.66 mm
L/W Ratio1.40
Girdle conditionFaceted
Culet sizePointed
Top View
14.94 mm10.69 mm6.65 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598388125
Side View
Table 60.0%Crown 35.1°Girdle: THN-STKPavilion 40.9°Culet: NoneDepth 62.3%

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 1
Current: £4,255 GBP|Low: £659 GBP|High: £4,426 GBP|Avg: £1,675 GBP|-3.1%
Brilliant Earth
Retailer 2
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November 2, 2026
Retailer 6£679 GBP
Retailer 20£738 GBP
Retailer 10£761 GBP
Retailer 4£788 GBP
Retailer 22£788 GBP
Retailer 3£848 GBP
Retailer 17£917 GBP
Retailer 7£1,154 GBP
Retailer 2£1,203 GBP
Retailer 11£1,263 GBP
Retailer 16£1,289 GBP
Retailer 18£1,459 GBP
Retailer 19£1,524 GBP
Retailer 21£1,753 GBP
Retailer 8£2,005 GBP
Retailer 9£2,180 GBP
Retailer 5£2,215 GBP
Retailer 12£2,461 GBP
Retailer 14£2,464 GBP
Retailer 13£2,672 GBP
Retailer 15£2,738 GBP
Brilliant Earth£4,255 GBP

36 data points across 22 retailers

20 retailers£679 GBP to £4,255 GBP

A
Cheapest Retailer
-
£679 GBP
$911 USD
A
Retailer 2
-
£738 GBP
$991 USD
View
A
Retailer 3
-
£788 GBP
$1,057 USD
View
Retailer 4
-
£788 GBP
$1,057 USD
View
Price last confirmed 16 days ago
A
Retailer 5
-
£917 GBP
$1,230 USD
View
A
Retailer 6
-
£1,154 GBP
$1,549 USD
View
A
Retailer 7
-
£1,203 GBP
View
B+
Retailer 8
-
£1,263 GBP
$1,695 USD
View
A
Retailer 9
-
£1,289 GBP
€1,647 EUR
View
B+
Retailer 10
-
£1,459 GBP
A$3,013 AUD
View
A
Retailer 11
-
£1,524 GBP
ZAR 33,043 ZAR
View
B+
Retailer 12
-
£1,753 GBP
$2,352 USD
View
B+
Retailer 13
-
£2,005 GBP
$2,691 USD
View
B+
Retailer 14
-
£2,180 GBP
View
B+
Retailer 15
-
£2,215 GBP
$2,972 USD
View
Retailer 16
-
£2,461 GBP
$3,302 USD
View
Price last confirmed 22 days ago
B+
Retailer 17
-
£2,464 GBP
$3,307 USD
View
B+
Retailer 18
-
£2,672 GBP
View
B
Retailer 19
-
£2,738 GBP
$3,674 USD
View
Most Expensive
B
Brilliant Earth
8138297A · Nov 2
£4,255 GBP
$5,710 USD
View
19 more retailers have this diamond
Prices start from £679 GBPSave up to £3,576 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
6.65ct Oval
£679 GBP