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Radiant|Lab Grown|IGI

4.78ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG831678037

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG831678037

Diamond specifications and retailer prices

From £452 GBP
$605 USD
As of October 27, 2026
Save £2,668 GBP (86%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,120 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4.78ct lab-grown radiant diamond

This 4.78ct lab-grown radiant sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG831678037 or 831678037. Listed at 15 retailers as of October 27, 2026, with prices from £452 to £3,120, a £2,668 spread on the same certified stone. Brilliant Earth lists it at £3,120. 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
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831678037
Dimensions11.74 × 8.35 × 5.67 mm
L/W Ratio1.41
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.74 mm8.35 mm4.78 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831678037
Side View
Table 68.0%Crown 44.1°Girdle: ThickPavilion 35.6°Culet: NoneDepth 67.9%

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: Oct 27
Current: £3,120 GBP|Low: £499 GBP|High: £3,150 GBP|Avg: £1,517 GBP|-0.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 31, 2026
Retailer 3£499 GBP
Retailer 7£525 GBP
Retailer 8£649 GBP
Retailer 14£740 GBP
Retailer 4£849 GBP
Retailer 5£1,129 GBP
Retailer 2£1,171 GBP
Retailer 13£1,287 GBP
Retailer 10£1,452 GBP
Retailer 11£1,674 GBP
Retailer 6£2,317 GBP
Retailer 9£2,409 GBP
Retailer 12£2,435 GBP
Brilliant Earth£3,120 GBP

31 data points across 14 retailers

15 retailers£452 GBP to £3,120 GBP

A
Cheapest Retailer
-
£452 GBP
$605 USD
A
Retailer 2
-
£499 GBP
$668 USD
View
A
Retailer 3
-
£525 GBP
$704 USD
View
Final sale: no returns
A
Retailer 4
-
£649 GBP
$870 USD
View
B+
Retailer 5
-
£740 GBP
$992 USD
View
Retailer 6
-
£849 GBP
€1,083 EUR
View
Price last confirmed 8 days ago
Retailer 7
-
£1,129 GBP
A$2,327 AUD
View
Price last confirmed 11 days ago
A
Retailer 8
-
£1,171 GBP
$1,569 USD
View
A
Retailer 9
-
£1,287 GBP
$1,724 USD
View
B+
Retailer 10
-
£1,452 GBP
$1,946 USD
View
B+
Retailer 11
-
£1,674 GBP
$2,243 USD
View
B
Retailer 12
-
£2,317 GBP
$3,105 USD
View
B+
Retailer 13
-
£2,409 GBP
View
B
Retailer 14
-
£2,435 GBP
$3,263 USD
View
Most Expensive
B
Brilliant Earth
21304716A · Oct 29
£3,120 GBP
$4,180 USD
View
14 more retailers have this diamond
Prices start from £452 GBPSave up to £2,668 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 Radiant
£452 GBP