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Cushion|Lab Grown|IGI

4.78ct F VS1 Cushion Lab Grown Diamond

EX • F/VS1 • IGI LG816609629

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG816609629

Diamond specifications and retailer prices

From £601 GBP
HK$6,300 HKD
As of November 1, 2026
Save £1,836 GBP (75%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,437 GBP at With Clarity · As of November 2, 2026
View at With Clarity

About this 4.78ct lab-grown cushion diamond

This 4.78ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG816609629 or 816609629. Listed at 8 retailers as of November 1, 2026, with prices from £601 to £2,437, a £1,836 spread on the same certified stone. With Clarity lists it at £2,437. 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

4.78
Carat
F
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816609629
Dimensions12.69 × 8.65 × 5.77 mm
L/W Ratio1.47
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.69 mm8.65 mm4.78 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816609629
Side View
Table 63.0%Crown 32.7°Girdle: MED-THKPavilion 39.6°Culet: NoneDepth 66.7%

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: Nov 1
Current: £868 GBP|Low: £601 GBP|High: £2,438 GBP|Avg: £1,342 GBP|+2.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 4£601 GBP
Retailer 5£749 GBP
Retailer 3£832 GBP
Retailer 1£868 GBP
Retailer 6£1,431 GBP
Retailer 7£1,795 GBP
Retailer 2£2,410 GBP

42 data points across 7 retailers

8 retailers£601 GBP to £2,437 GBP

A
Cheapest Retailer
-
£601 GBP
HK$6,300 HKD
B+
Retailer 2
-
£749 GBP
$1,005 USD
View
A
Retailer 3
-
£832 GBP
€1,063 EUR
View
A
Retailer 4
-
£868 GBP
View
A
Retailer 5
-
£1,431 GBP
$1,920 USD
View
B+
Retailer 6
-
£1,795 GBP
$2,408 USD
View
B+
Retailer 7
-
£2,410 GBP
View
Most Expensive
B
With Clarity
816609629 · Nov 2
£2,437 GBP
$3,270 USD
View
7 more retailers have this diamond
Prices start from £601 GBPSave up to £1,836 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
4.78ct Cushion
£601 GBP