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Round|Lab Grown|IGI

12.03ct F VS1 Round Lab Grown Diamond

ID • F/VS1 • IGI LG658495639

Shape and cutting style on the report: Round brilliant

Certificate IGI LG658495639

Diamond specifications and retailer prices

From £3,037 GBP
$4,069 USD
As of November 1, 2026
Save £6,719 GBP (69%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £9,756 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 LG658495639 or 658495639. Listed at 7 retailers as of October 31, 2026, with prices from £3,037 to £9,756, a £6,719 spread on the same certified stone. Taylor and Hart lists it at £9,756. 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 angle35.3°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG658495639
Dimensions14.80 × 14.74 × 8.96 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
14.80 mm14.74 mm12.03 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG658495639
Side View
Table 59.0%Crown 35.3°Girdle: MediumPavilion 40.5°Culet: NoneDepth 60.6%

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: £3,694 GBP|Low: £2,929 GBP|High: £9,756 GBP|Avg: £5,375 GBP|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Taylor and Hart
November 2, 2026
Retailer 4£3,037 GBP
Retailer 1£3,694 GBP
Retailer 5£4,332 GBP
Retailer 2£4,733 GBP
Retailer 3£4,735 GBP
Retailer 6£7,148 GBP
Taylor and Hart£9,756 GBP

25 data points across 7 retailers

7 retailers£3,037 GBP to £9,756 GBP

A
Cheapest Retailer
-
£3,037 GBP
$4,069 USD
A
Retailer 2
-
£3,694 GBP
View
B+
Retailer 3
-
£4,332 GBP
$5,804 USD
View
B+
Retailer 4
-
£4,733 GBP
€6,040 EUR
View
Retailer 5
-
£4,735 GBP
$6,345 USD
View
Price last confirmed 15 days ago
B
Retailer 6
-
£7,148 GBP
$9,577 USD
View
Most Expensive
B
Taylor and Hart
SMI3ON0 · Oct 31
£9,756 GBP
$13,072 USD
View
6 more retailers have this diamond
Prices start from £3,037 GBPSave up to £6,719 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
£3,037 GBP