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Marquise|Lab Grown|IGI

4.77ct G SI1 Marquise Lab Grown Diamond

ID • G/SI1 • IGI LG650487530

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG650487530

Diamond specifications and retailer prices

From £452 GBP
$605 USD
As of October 30, 2026
Save £2,045 GBP (82%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,496 GBP at Adiamor · As of October 31, 2026
View at Adiamor

About this 4.77ct lab-grown marquise diamond

This 4.77ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG650487530 or 650487530. Listed at 13 retailers as of October 30, 2026, with prices from £452 to £2,496, a £2,045 spread on the same certified stone. Adiamor lists it at £2,496. 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

4.77
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG650487530
Dimensions17.82 × 8.83 × 5.33 mm
L/W Ratio2.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
17.82 mm8.83 mm4.77 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG650487530
Side View
Table 62.0%Crown 35.2°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 60.4%

Caratlytics Score

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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 30
Current: £2,496 GBP|Low: £452 GBP|High: £5,142 GBP|Avg: £1,604 GBP
Adiamor
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
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 12£452 GBP
Retailer 6£506 GBP
Retailer 2£530 GBP
Retailer 13£560 GBP
Retailer 17£621 GBP
Retailer 14£657 GBP
Retailer 16£822 GBP
Retailer 4£859 GBP
Retailer 10£870 GBP
Retailer 7£1,134 GBP
Retailer 11£1,390 GBP
Retailer 3£1,473 GBP
Retailer 5£2,444 GBP
Retailer 15£2,445 GBP
Adiamor£2,496 GBP
Retailer 8£3,940 GBP
Retailer 9£5,142 GBP

5 data points across 17 retailers

13 retailers£452 GBP to £2,496 GBP

A
Cheapest Retailer
-
£452 GBP
$605 USD
A
Retailer 2
-
£506 GBP
$678 USD
View
A
Retailer 3
-
£530 GBP
View
A
Retailer 4
-
£560 GBP
$751 USD
View
A
Retailer 5
-
£621 GBP
HK$6,500 HKD
View
A
Retailer 6
-
£657 GBP
$880 USD
View
A
Retailer 7
-
£822 GBP
$1,102 USD
View
B+
Retailer 8
-
£859 GBP
$1,151 USD
View
A
Retailer 9
-
£870 GBP
View
B+
Retailer 10
-
£1,390 GBP
$1,863 USD
View
B
Retailer 11
-
£1,473 GBP
$1,974 USD
View
B
Retailer 12
-
£2,445 GBP
View
Most Expensive
B
Adiamor
D-82834320 · Oct 31
£2,496 GBP
$3,345 USD
View
12 more retailers have this diamond
Prices start from £452 GBPSave up to £2,045 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
4.77ct Marquise
£452 GBP