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Round|Lab Grown|IGI

18.31ct G VS1 Round Lab Grown Diamond

ID • G/VS1 • IGI LG779646467

Shape and cutting style on the report: Round brilliant

Certificate IGI LG779646467

Diamond specifications and retailer prices

From £6,709 GBP
$8,989 USD
As of October 30, 2026
Save £16,084 GBP (71%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £22,793 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 18.31ct lab-grown round diamond

This 18.31ct 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 LG779646467 or 779646467. Listed at 7 retailers as of October 30, 2026, with prices from £6,709 to £22,793, a £16,084 spread on the same certified stone. Taylor and Hart lists it at £22,793. 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

18.31
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG779646467
Dimensions17.13 × 17.19 × 10.19 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
17.13 mm17.19 mm18.31 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG779646467
Side View
Table 58.0%Crown 33.3°Girdle: MediumPavilion 40.3°Culet: NoneDepth 59.4%

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 30
Current: £11,520 GBP|Low: £6,499 GBP|High: £22,793 GBP|Avg: £11,589 GBP|-4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Taylor and Hart
October 31, 2026
Retailer 4£6,709 GBP
Retailer 3£7,007 GBP
Retailer 6£7,289 GBP
Retailer 2£8,471 GBP
Retailer 1£11,520 GBP
Retailer 5£16,416 GBP
Taylor and Hart£22,793 GBP

40 data points across 7 retailers

7 retailers£6,709 GBP to £22,793 GBP

A
Cheapest Retailer
-
£6,709 GBP
$8,989 USD
A
Retailer 2
-
£7,007 GBP
$9,388 USD
View
B+
Retailer 3
-
£7,289 GBP
HK$76,300 HKD
View
B+
Retailer 4
-
£8,471 GBP
View
B+
Retailer 5
-
£11,520 GBP
€14,700 EUR
View
B
Retailer 6
-
£16,416 GBP
$21,996 USD
View
Most Expensive
B
Taylor and Hart
TLX10KG · Oct 31
£22,793 GBP
$30,540 USD
View
6 more retailers have this diamond
Prices start from £6,709 GBPSave up to £16,084 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
18.31ct Round
£6,709 GBP