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Radiant|Lab Grown|IGI

12.56ct F VS1 Radiant Lab Grown Diamond

F/VS1 • IGI LG771603875

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG771603875

Diamond specifications and retailer prices

From £1,140 GBP
As of November 2, 2026
Save £8,324 GBP (88%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £9,471 GBP at Brilliant Earth · As of October 21, 2026
View at Brilliant Earth

About this 12.56ct lab-grown radiant diamond

This 12.56ct lab-grown radiant sits in the over five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included) and certified by IGI LG771603875 or 771603875. Listed at 26 retailers as of October 31, 2026, with a 730% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

12.56
Carat
F
Colour
VS1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.7°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771603875
Dimensions11.55 × 11.55 × 7.63 mm
L/W Ratio1.00
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.55 mm11.55 mm12.56 ctF / VS1
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771603875
Side View
Table 65.0%Crown 42.7°Girdle: Slightly ThickPavilion 39.6°Culet: NoneDepth 66.1%

Caratlytics Score

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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 2
Current: £9,463 GBP|Low: £1,140 GBP|High: £9,471 GBP|Avg: £3,465 GBP|-0.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 11
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Retailer 13
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Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 2, 2026
Retailer 16£1,140 GBP
Retailer 7£1,223 GBP
Retailer 18£1,331 GBP
Retailer 12£1,420 GBP
Retailer 22£1,504 GBP
Retailer 8£1,691 GBP
Retailer 17£1,995 GBP
Retailer 2£2,208 GBP
Retailer 13£2,230 GBP
Retailer 14£2,324 GBP
Retailer 5£2,447 GBP
Retailer 20£2,630 GBP
Retailer 19£2,660 GBP
Retailer 11£2,935 GBP
Retailer 6£3,825 GBP
Retailer 15£4,355 GBP
Retailer 9£4,905 GBP
Retailer 10£4,983 GBP
Retailer 4£5,896 GBP
Retailer 21£6,692 GBP
Retailer 3£7,147 GBP
Brilliant Earth£9,463 GBP

29 data points across 22 retailers

26 retailers£1,140 GBP to £9,463 GBP

A
Cheapest Retailer
-
£1,140 GBP
A
Retailer 2
-
£1,223 GBP
$1,639 USD
View
A
Retailer 3
-
£1,331 GBP
$1,784 USD
View
A
Retailer 4
-
£1,420 GBP
$1,902 USD
View
A
Retailer 5
-
£1,504 GBP
$2,015 USD
View
A
Retailer 6
-
£1,593 GBP
$2,135 USD
View
Final sale: no returns
A
Retailer 7
-
£1,691 GBP
HK$17,700 HKD
View
A
Retailer 8
-
£1,995 GBP
View
A
Retailer 9
-
£2,208 GBP
€2,817 EUR
View
B+
Retailer 10
-
£2,230 GBP
$2,988 USD
View
A
Retailer 11
-
£2,324 GBP
ZAR 50,307 ZAR
View
B+
Retailer 12
-
£2,447 GBP
$3,279 USD
View
Retailer 13
-
£2,484 GBP
$3,328 USD
View
Price last confirmed 7 days ago
A
Retailer 14
-
£2,630 GBP
A$5,421 AUD
View
B+
Retailer 15
-
£2,660 GBP
$3,564 USD
View
B+
Retailer 16
-
£2,935 GBP
View
B+
Retailer 17
-
£3,779 GBP
$5,064 USD
View
B
Retailer 18
-
£3,825 GBP
$5,125 USD
View
B+
Retailer 19
-
£4,355 GBP
$5,835 USD
View
B
Retailer 20
-
£4,905 GBP
SGD 8,881 SGD
View
B
Retailer 21
-
£4,983 GBP
$6,676 USD
View
B
Retailer 22
-
£5,896 GBP
$7,900 USD
View
B
Retailer 23
-
£6,692 GBP
A$13,794 AUD
View
B
Retailer 24
-
£7,147 GBP
$9,576 USD
View
B
Retailer 25
-
£9,463 GBP
$12,680 USD
View
Most Expensive
Brilliant Earth
18438142A · Oct 21
£9,471 GBP
$12,690 USD
View
Price last confirmed 11 days ago
25 more retailers have this diamond
Prices start from £1,140 GBPSave up to £8,324 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
12.56ct Radiant
£1,140 GBP