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Round|Lab Grown|IGI

12.03ct F VS1 Round Lab Grown Diamond

ID • F/VS1 • IGI LG843678306

Shape and cutting style on the report: Round brilliant

Certificate IGI LG843678306

Diamond specifications and retailer prices

From £1,913 GBP
As of November 1, 2026
Save £6,390 GBP (77%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £8,303 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 12.03ct lab-grown round diamond

This 12.03ct lab-grown round sits in the over five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG843678306 or 843678306. Listed at 12 retailers as of October 31, 2026, with prices from £1,913 to £8,303, a £6,390 spread on the same certified stone. Taylor and Hart lists it at £8,303. 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

12.03
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843678306
Dimensions14.91 × 14.86 × 8.87 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.91 mm14.86 mm12.03 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843678306
Side View
Table 58.0%Crown 33.6°Girdle: MediumPavilion 40.2°Culet: NoneDepth 59.6%

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: £3,205 GBP|Low: £1,913 GBP|High: £8,303 GBP|Avg: £4,414 GBP|+0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Taylor and Hart
November 2, 2026
Retailer 5£1,913 GBP
Retailer 11£2,299 GBP
Retailer 6£2,385 GBP
Retailer 1£3,205 GBP
Retailer 8£3,423 GBP
Retailer 7£3,688 GBP
Retailer 3£3,706 GBP
Retailer 4£4,414 GBP
Retailer 2£5,984 GBP
Retailer 9£6,643 GBP
Retailer 10£7,030 GBP
Taylor and Hart£8,303 GBP

11 data points across 12 retailers

12 retailers£1,913 GBP to £8,303 GBP

A
Cheapest Retailer
-
£1,913 GBP
A
Retailer 2
-
£2,299 GBP
$3,081 USD
View
Final sale: no returns
A
Retailer 3
-
£2,385 GBP
$3,195 USD
View
A
Retailer 4
-
£3,205 GBP
View
A
Retailer 5
-
£3,423 GBP
$4,586 USD
View
A
Retailer 6
-
£3,688 GBP
ZAR 79,824 ZAR
View
A
Retailer 7
-
£3,706 GBP
$4,966 USD
View
B+
Retailer 8
-
£4,414 GBP
A$9,098 AUD
View
B+
Retailer 9
-
£5,984 GBP
$8,018 USD
View
B
Retailer 10
-
£6,643 GBP
$8,901 USD
View
B
Retailer 11
-
£7,030 GBP
$9,419 USD
View
Most Expensive
B
Taylor and Hart
8N659ES · Oct 31
£8,303 GBP
$11,125 USD
View
11 more retailers have this diamond
Prices start from £1,913 GBPSave up to £6,390 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
12.03ct Round
£1,913 GBP