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Round|Lab Grown|IGI

6.51ct G VS1 Round Lab Grown Diamond

ID • G/VS1 • IGI LG675550851

Shape and cutting style on the report: Round brilliant

Certificate IGI LG675550851

Diamond specifications and retailer prices

From £729 GBP
$977 USD
As of November 1, 2026
Save £2,218 GBP (75%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,947 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 6.51ct lab-grown round diamond

This 6.51ct 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 LG675550851 or 675550851. Listed at 17 retailers as of October 31, 2026, with prices from £729 to £2,947, a £2,218 spread on the same certified stone. Taylor and Hart lists it at £2,947. 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
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG675550851
Dimensions12.05 × 12.01 × 7.30 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.05 mm12.01 mm6.51 ctG / VS1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG675550851
Side View
Table 60.0%Crown 34°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 60.7%

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: Nov 1
Current: £1,300 GBP|Low: £729 GBP|High: £3,172 GBP|Avg: £1,486 GBP|-1.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Taylor and Hart
November 2, 2026
Retailer 7£729 GBP
Retailer 10£793 GBP
Retailer 5£816 GBP
Retailer 15£846 GBP
Retailer 8£924 GBP
Retailer 9£978 GBP
Retailer 14£1,205 GBP
Retailer 1£1,300 GBP
Retailer 6£1,353 GBP
Retailer 2£1,586 GBP
Retailer 13£1,637 GBP
Retailer 11£1,823 GBP
Retailer 3£2,070 GBP
Retailer 16£2,614 GBP
Retailer 4£2,623 GBP
Retailer 12£2,884 GBP
Taylor and Hart£2,947 GBP

41 data points across 17 retailers

17 retailers£729 GBP to £2,947 GBP

A
Cheapest Retailer
-
£729 GBP
$977 USD
A
Retailer 2
-
£793 GBP
$1,063 USD
View
A
Retailer 3
-
£816 GBP
$1,093 USD
View
Final sale: no returns
A
Retailer 4
-
£846 GBP
$1,134 USD
View
Retailer 5
-
£924 GBP
$1,238 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
£978 GBP
$1,310 USD
View
A
Retailer 7
-
£1,205 GBP
$1,614 USD
View
A
Retailer 8
-
£1,300 GBP
View
B+
Retailer 9
-
£1,353 GBP
$1,813 USD
View
B+
Retailer 10
-
£1,586 GBP
$2,125 USD
View
B+
Retailer 11
-
£1,637 GBP
ZAR 35,433 ZAR
View
B+
Retailer 12
-
£1,823 GBP
$2,443 USD
View
B+
Retailer 13
-
£2,070 GBP
$2,773 USD
View
B
Retailer 14
-
£2,614 GBP
$3,503 USD
View
B
Retailer 15
-
£2,623 GBP
$3,515 USD
View
B
Retailer 16
-
£2,884 GBP
View
Most Expensive
B
Taylor and Hart
DT02D8K · Oct 31
£2,947 GBP
$3,949 USD
View
16 more retailers have this diamond
Prices start from £729 GBPSave up to £2,218 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 Round
£729 GBP