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Cushion|Lab Grown|IGI

4.78ct F VS1 Cushion Lab Grown Diamond

EX • F/VS1 • IGI LG819630337

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

Certificate IGI LG819630337

Diamond specifications and retailer prices

From €623 EUR
$699 USD
As of November 1, 2026
Save €240 EUR (28%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: €1,993 EUR at Brilliance · As of October 5, 2026
View at Brilliance

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 LG819630337 or 819630337. Listed at 3 retailers as of October 28, 2026, with a 38% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG819630337
Dimensions9.86 × 9.83 × 6.51 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.86 mm9.83 mm4.78 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG819630337
Side View
Table 63.0%Crown 34.4°Girdle: STK-THKPavilion 40.1°Culet: NoneDepth 66.2%

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: Nov 1
Current: €1,993 EUR|Low: €623 EUR|High: €4,708 EUR|Avg: €1,911 EUR|-10.1%
Brilliance
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 27, 2026
Retailer 2€623 EUR
Retailer 4€776 EUR
Retailer 3€863 EUR
Retailer 5€1,063 EUR
Brilliance€1,993 EUR
Retailer 7€2,446 EUR
Retailer 6€4,708 EUR

9 data points across 7 retailers

3 retailers€623 EUR to €863 EUR

A
Cheapest Retailer
-
€623 EUR
$699 USD
Final sale: no returns
B+
Retailer 2
-
€863 EUR
$968 USD
View
Most Expensive
Brilliance
D45376121 · Oct 5
€1,993 EUR
$2,235 USD
View
Price last confirmed 28 days ago
2 more retailers have this diamond
Prices start from €623 EURSave up to €240 EUR

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
€623 EUR