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Cushion|Lab Grown|IGI

3.06ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG788659677

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG788659677

Diamond specifications and retailer prices

From £1,972 GBP
$2,640 USD
As of November 6, 2026
1 retailer carries this diamond
Only listing: £1,972 GBP at Brilliant Earth
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 Brilliant Earth

About this 3.06ct lab-grown cushion diamond

This 3.06ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG788659677 or 788659677. Listed at a single retailer as of November 6, 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

3.06
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788659677
Dimensions9.83 × 7.67 × 5.13 mm
L/W Ratio1.28
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.83 mm7.67 mm3.06 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788659677
Side View
Table 61.0%Crown 34.4°Girdle: MED-THKPavilion 36.2°Culet: NoneDepth 66.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: £1,972 GBP|Low: £196 GBP|High: £1,972 GBP|Avg: £789 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
September 2, 2026
Retailer 6£366 GBP
Retailer 5£372 GBP
Retailer 4£467 GBP
Retailer 3£484 GBP
Retailer 2£747 GBP
Retailer 8£1,024 GBP
Retailer 7£1,626 GBP
Brilliant Earth£1,972 GBP

60 data points across 8 retailers

1 retailer

B
Brilliant Earth
18559004A · Nov 6
£1,972 GBP
$2,640 USD
View

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.

B
3.06ct Cushion
£1,972 GBP