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Oval|Lab Grown|IGI

12.83ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • IGI LG573313066

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG573313066

Diamond specifications and retailer prices

From £1,546 GBP
As of October 27, 2026
Save £12,269 GBP (89%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £13,815 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 12.83ct lab-grown oval diamond

This 12.83ct 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 LG573313066 or 573313066. Listed at 12 retailers as of October 27, 2026, with prices from £1,546 to £13,815, a £12,269 spread on the same certified stone. Brilliant Earth lists it at £13,815. 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

12.83
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG573313066
Dimensions19.20 × 13.12 × 8.20 mm
L/W Ratio1.46
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
19.20 mm13.12 mm12.83 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG573313066
Side View
Table 59.5%Crown 36.4°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 62.5%

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: Oct 27
Current: £14,994 GBP|Low: £1,546 GBP|High: £17,070 GBP|Avg: £8,085 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 18
November 1, 2026
Retailer 16£1,546 GBP
Retailer 12£2,179 GBP
Retailer 17£2,743 GBP
Retailer 7£3,000 GBP
Retailer 11£3,222 GBP
Retailer 13£3,305 GBP
Retailer 6£3,308 GBP
Retailer 5£3,957 GBP
Retailer 2£4,426 GBP
Retailer 4£4,780 GBP
Retailer 18£6,548 GBP
Retailer 14£8,381 GBP
Retailer 3£9,269 GBP
Retailer 15£10,307 GBP
Brilliant Earth£14,994 GBP
Retailer 8£15,792 GBP
Retailer 10£15,792 GBP
Retailer 9£17,070 GBP

11 data points across 18 retailers

12 retailers£1,546 GBP to £13,815 GBP

A
Cheapest Retailer
-
£1,546 GBP
A
Retailer 2
-
£2,179 GBP
$2,919 USD
View
B+
Retailer 3
-
£2,743 GBP
$3,675 USD
View
B
Retailer 4
-
£3,222 GBP
View
B
Retailer 5
-
£3,305 GBP
$4,429 USD
View
B
Retailer 6
-
£4,426 GBP
$5,930 USD
View
B
Retailer 7
-
£4,780 GBP
$6,404 USD
View
B
Retailer 8
-
£6,548 GBP
$8,774 USD
View
B
Retailer 9
-
£8,381 GBP
$11,230 USD
View
B
Retailer 10
-
£9,269 GBP
$12,419 USD
View
B
Retailer 11
-
£10,307 GBP
$13,810 USD
View
Most Expensive
B
Brilliant Earth
22301618A · Oct 31
£13,815 GBP
$18,510 USD
View
11 more retailers have this diamond
Prices start from £1,546 GBPSave up to £12,269 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
12.83ct Oval
£1,546 GBP