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Round|Lab Grown|IGI

12.09ct F VS1 Round Lab Grown Diamond

ID • F/VS1 • IGI LG612326578

Shape and cutting style on the report: Round brilliant

Certificate IGI LG612326578

Diamond specifications and retailer prices

From £6,563 GBP
HK$68,700 HKD
As of November 1, 2026
Save £13,252 GBP (67%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £19,815 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 12.09ct lab-grown round diamond

This 12.09ct 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 LG612326578 or 612326578. Listed at 3 retailers as of October 31, 2026, with prices from £6,563 to £19,815, a £13,252 spread on the same certified stone. Brilliant Earth lists it at £19,815. 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

12.09
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG612326578
Dimensions14.72 × 14.67 × 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 and may include post-growth treatment Type IIa
Top View
14.72 mm14.67 mm12.09 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG612326578
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 60.9%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 1
Current: £19,815 GBP|Low: £6,563 GBP|High: £21,547 GBP|Avg: £12,716 GBP|-7.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 4, 2026
Retailer 5£6,563 GBP
Retailer 3£8,045 GBP
Retailer 4£8,114 GBP
Retailer 6£12,939 GBP
Retailer 2£14,094 GBP
Brilliant Earth£19,815 GBP

18 data points across 6 retailers

3 retailers£6,563 GBP to £19,815 GBP

B+
Cheapest Retailer
-
£6,563 GBP
HK$68,700 HKD
Retailer 2
-
£14,094 GBP
$18,885 USD
View
Price last confirmed 20 days ago
Most Expensive
B
Brilliant Earth
9248612A · Oct 31
£19,815 GBP
$26,550 USD
View
2 more retailers have this diamond
Prices start from £6,563 GBPSave up to £13,252 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.

B+
12.09ct Round
£6,563 GBP