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Oval|Lab Grown|IGI

15.71ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • IGI LG635468337

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG635468337

Diamond specifications and retailer prices

From £2,742 GBP
As of October 27, 2026
Save £15,544 GBP (85%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £18,285 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 15.71ct lab-grown oval diamond

This 15.71ct 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 LG635468337 or 635468337. Listed at 11 retailers as of October 27, 2026, with prices from £2,742 to £18,285, a £15,544 spread on the same certified stone. Do Amore Diamonds lists it at £18,285. 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

15.71
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG635468337
Dimensions20.93 × 13.91 × 8.69 mm
L/W Ratio1.50
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
20.93 mm13.91 mm15.71 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG635468337
Side View
Table 59.0%Crown 35.3°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.5%

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: £18,285 GBP|Low: £2,742 GBP|High: £53,429 GBP|Avg: £12,338 GBP
Do Amore Diamonds
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 13£2,742 GBP
Retailer 10£3,800 GBP
Retailer 14£4,933 GBP
Retailer 11£5,240 GBP
Retailer 5£5,252 GBP
Retailer 9£5,343 GBP
Retailer 7£5,455 GBP
Retailer 2£5,463 GBP
Retailer 4£7,047 GBP
Retailer 3£8,459 GBP
Retailer 15£9,899 GBP
Retailer 12£15,033 GBP
Retailer 16£16,696 GBP
Do Amore Diamonds£18,285 GBP
Retailer 6£18,360 GBP
Retailer 8£53,429 GBP

10 data points across 16 retailers

11 retailers£2,742 GBP to £18,285 GBP

A
Cheapest Retailer
-
£2,742 GBP
B+
Retailer 2
-
£3,800 GBP
$5,091 USD
View
B+
Retailer 3
-
£4,933 GBP
$6,610 USD
View
B
Retailer 4
-
£5,240 GBP
$7,021 USD
View
B
Retailer 5
-
£5,343 GBP
View
B
Retailer 6
-
£8,459 GBP
$11,334 USD
View
B
Retailer 7
-
£9,899 GBP
$13,264 USD
View
B
Retailer 8
-
£15,033 GBP
$20,142 USD
View
B
Retailer 9
-
£16,696 GBP
$22,371 USD
View
B
Retailer 10
-
£17,270 GBP
$23,140 USD
View
Most Expensive
B
Do Amore Diamonds
27-F9C3B9F41 · Oct 29
£18,285 GBP
$24,500 USD
View
10 more retailers have this diamond
Prices start from £2,742 GBPSave up to £15,544 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
15.71ct Oval
£2,742 GBP