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Cushion|Lab Grown|IGI

4.89ct F VS1 Cushion Lab Grown Diamond

ID • F/VS1 • IGI LG817656166

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG817656166

Diamond specifications and retailer prices

From £570 GBP
$765 USD
As of November 1, 2026
Save £1,195 GBP (68%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,927 GBP at Frank Darling · As of October 24, 2026
View at Frank Darling

About this 4.89ct lab-grown cushion diamond

This 4.89ct 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 LG817656166 or 817656166. Listed at 6 retailers as of November 1, 2026, with a 210% 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

4.89
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817656166
Dimensions11.97 × 8.84 × 5.84 mm
L/W Ratio1.35
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.97 mm8.84 mm4.89 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817656166
Side View
Table 64.0%Crown 35.6°Girdle: MED-STKPavilion 35.9°Culet: NoneDepth 66.1%

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: £3,927 GBP|Low: £570 GBP|High: £3,927 GBP|Avg: £1,867 GBP|-0.0%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 3£570 GBP
Retailer 4£784 GBP
Retailer 5£1,157 GBP
Retailer 2£1,765 GBP
Retailer 6£2,724 GBP
Frank Darling£3,927 GBP

14 data points across 6 retailers

6 retailers£570 GBP to £1,765 GBP

A
Cheapest Retailer
-
£570 GBP
$765 USD
Final sale: no returns
B+
Retailer 2
-
£784 GBP
$1,052 USD
View
Retailer 3
-
£1,157 GBP
$1,553 USD
View
Price last confirmed 20 days ago
B+
Retailer 4
-
£1,765 GBP
$2,369 USD
View
Retailer 5
-
£2,724 GBP
$3,655 USD
View
Price last confirmed 26 days ago
Most Expensive
Frank Darling
100189028388KD · Oct 24
£3,927 GBP
$5,270 USD
View
Price last confirmed 9 days ago
5 more retailers have this diamond
Prices start from £570 GBPSave up to £1,195 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
4.89ct Cushion
£570 GBP