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Oval|Lab Grown|IGI

12.05ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • IGI LG560216123

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG560216123

Diamond specifications and retailer prices

From £1,453 GBP
As of October 27, 2026
Save £11,518 GBP (89%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £12,971 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 12.05ct lab-grown oval diamond

This 12.05ct lab-grown oval sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG560216123 or 560216123. Listed at 11 retailers as of October 27, 2026, with prices from £1,453 to £12,971, a £11,518 spread on the same certified stone. Brilliant Earth lists it at £12,971. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

12.05
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG560216123
Dimensions18.33 × 12.92 × 8.19 mm
L/W Ratio1.42
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
18.33 mm12.92 mm12.05 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG560216123
Side View
Table 59.5%Crown 35.8°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 63.4%

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: Oct 27
Current: £14,083 GBP|Low: £1,453 GBP|High: £16,032 GBP|Avg: £6,245 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 14£1,453 GBP
Retailer 10£2,047 GBP
Retailer 15£2,579 GBP
Retailer 7£2,818 GBP
Retailer 9£3,027 GBP
Retailer 11£3,106 GBP
Retailer 6£3,114 GBP
Retailer 5£3,716 GBP
Retailer 2£4,310 GBP
Retailer 4£4,503 GBP
Retailer 16£5,797 GBP
Retailer 12£7,882 GBP
Retailer 3£8,705 GBP
Retailer 13£9,687 GBP
Brilliant Earth£14,083 GBP
Retailer 8£16,032 GBP

11 data points across 16 retailers

11 retailers£1,453 GBP to £12,971 GBP

A
Cheapest Retailer
-
£1,453 GBP
A
Retailer 2
-
£2,047 GBP
$2,743 USD
View
B+
Retailer 3
-
£2,579 GBP
$3,455 USD
View
B
Retailer 4
-
£3,027 GBP
View
B
Retailer 5
-
£3,106 GBP
$4,162 USD
View
B
Retailer 6
-
£4,503 GBP
$6,034 USD
View
B
Retailer 7
-
£5,797 GBP
$7,768 USD
View
B
Retailer 8
-
£7,882 GBP
$10,561 USD
View
B
Retailer 9
-
£8,705 GBP
$11,664 USD
View
B
Retailer 10
-
£9,687 GBP
$12,980 USD
View
Most Expensive
B
Brilliant Earth
22301436A · Oct 31
£12,971 GBP
$17,380 USD
View
10 more retailers have this diamond
Prices start from £1,453 GBPSave up to £11,518 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
12.05ct Oval
£1,453 GBP