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Cushion|Lab Grown|IGI

5.15ct F SI1 Cushion Lab Grown Diamond

EX • F/SI1 • IGI LG837687059

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG837687059

Diamond specifications and retailer prices

From £867 GBP
As of November 2, 2026
1 retailer carries this diamond
Only listing: £867 GBP at 77 Diamonds
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at 77 Diamonds

About this 5.15ct lab-grown cushion diamond

This 5.15ct lab-grown cushion 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 LG837687059 or 837687059. Listed at a single retailer as of November 2, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

5.15
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837687059
Dimensions10.12 × 9.90 × 6.71 mm
L/W Ratio1.02
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.12 mm9.90 mm5.15 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837687059
Side View
Table 62.0%Crown 34.3°Girdle: MED-STKPavilion 39.9°CuletDepth 67.6%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: £867 GBP|Low: £860 GBP|High: £934 GBP|Avg: £891 GBP|-5.4%
November 2, 2026
77 Diamonds£867 GBP

36 data points across 1 retailer

1 retailer

B+
77 Diamonds
CUSTVSMBZ6SS3E · Nov 2
£867 GBP
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B+
5.15ct Cushion
£867 GBP