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Oval|Lab Grown|IGI

16.78ct F VS2 Oval Lab Grown Diamond

ID • F/VS2 • IGI LG586343113

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG586343113

Diamond specifications and retailer prices

From £2,918 GBP
As of October 27, 2026
Save £18,233 GBP (86%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £21,151 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 16.78ct lab-grown oval diamond

This 16.78ct lab-grown oval sits in the over five carat band, graded F colour (colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG586343113 or 586343113. Listed at 12 retailers as of October 27, 2026, with prices from £2,918 to £21,151, a £18,233 spread on the same certified stone. Brilliant Earth lists it at £21,151. 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

16.78
Carat
F
Colour
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG586343113
Dimensions20.92 × 14.57 × 9.05 mm
L/W Ratio1.44
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
20.92 mm14.57 mm16.78 ctF / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG586343113
Side View
Table 59.0%Crown 35.8°Girdle: MediumPavilion 40.9°Culet: NoneDepth 62.1%

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: Oct 27
Current: £22,666 GBP|Low: £2,918 GBP|High: £57,068 GBP|Avg: £16,845 GBP
Brilliant Earth
Retailer 2
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Retailer 11
Retailer 12
Retailer 13
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Retailer 19
November 1, 2026
Retailer 17£2,918 GBP
Retailer 12£4,047 GBP
Retailer 18£5,265 GBP
Retailer 13£5,303 GBP
Retailer 16£5,668 GBP
Retailer 6£5,711 GBP
Retailer 2£5,720 GBP
Retailer 8£5,961 GBP
Retailer 5£7,684 GBP
Retailer 4£9,019 GBP
Retailer 19£10,050 GBP
Retailer 7£10,112 GBP
Retailer 14£15,987 GBP
Retailer 3£17,834 GBP
Retailer 15£19,464 GBP
Brilliant Earth£22,666 GBP
Retailer 9£40,988 GBP
Retailer 11£40,988 GBP
Retailer 10£57,068 GBP

10 data points across 19 retailers

12 retailers£2,918 GBP to £21,151 GBP

A
Cheapest Retailer
-
£2,918 GBP
A
Retailer 2
-
£4,047 GBP
$5,422 USD
View
B+
Retailer 3
-
£5,265 GBP
$7,055 USD
View
B+
Retailer 4
-
£5,303 GBP
$7,105 USD
View
B+
Retailer 5
-
£5,668 GBP
$7,595 USD
View
B+
Retailer 6
-
£5,720 GBP
View
B
Retailer 7
-
£9,019 GBP
$12,085 USD
View
B
Retailer 8
-
£10,050 GBP
$13,466 USD
View
B
Retailer 9
-
£15,987 GBP
$21,420 USD
View
B
Retailer 10
-
£17,834 GBP
$23,895 USD
View
B
Retailer 11
-
£19,464 GBP
$26,080 USD
View
Most Expensive
B
Brilliant Earth
22301118A · Oct 31
£21,151 GBP
$28,340 USD
View
11 more retailers have this diamond
Prices start from £2,918 GBPSave up to £18,233 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
16.78ct Oval
£2,918 GBP