Marquise|Lab Grown|IGI

5.09ct I VS1 Marquise Lab Grown Diamond

ID • I/VS1 • IGI LG680519605

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG680519605

Diamond specifications and retailer prices

From £4,210 GBP
$5,650 USD
As of November 2, 2026
19 retailers carry this diamond
Most expensive: £4,210 GBP at Brilliant Earth
View at Brilliant Earth

About this 5.09ct lab-grown marquise diamond

This 5.09ct lab-grown marquise sits in the over five carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG680519605 or 680519605. Listed at 19 retailers as of November 2, 2026. 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

5.09
Carat
I
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG680519605
Dimensions18.31 × 9.00 × 5.30 mm
L/W Ratio2.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.31 mm9.00 mm5.09 ctI / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG680519605
Side View
Table 60.0%Crown 34.1°Girdle: STK-THKPavilion 37.9°Culet: NoneDepth 58.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: £4,210 GBP|Low: £564 GBP|High: £4,337 GBP|Avg: £1,514 GBP|-2.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
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Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 20, 2026
Retailer 18£588 GBP
Retailer 4£639 GBP
Retailer 6£658 GBP
Retailer 5£682 GBP
Retailer 19£682 GBP
Retailer 2£767 GBP
Retailer 16£812 GBP
Retailer 8£964 GBP
Retailer 17£1,030 GBP
Retailer 13£1,030 GBP
Retailer 10£1,346 GBP
Retailer 12£1,370 GBP
Retailer 15£1,621 GBP
Retailer 3£1,917 GBP
Retailer 9£2,112 GBP
Retailer 7£2,292 GBP
Retailer 14£2,569 GBP
Retailer 11£2,600 GBP
Brilliant Earth£4,210 GBP

32 data points across 19 retailers

19 retailers

Retailer 1
-
£588 GBP
$789 USD
Price last confirmed 14 days ago
Retailer 2
-
£639 GBP
$858 USD
View
Price last confirmed 18 days ago
Retailer 3
-
£682 GBP
$915 USD
View
Price last confirmed 16 days ago
Retailer 4
-
£682 GBP
$915 USD
View
Price last confirmed 14 days ago
Retailer 5
-
£767 GBP
View
Price last confirmed 13 days ago
Retailer 6
-
£792 GBP
HK$8,300 HKD
View
Price last confirmed 59 days ago
Retailer 7
-
£812 GBP
$1,090 USD
View
Price last confirmed 13 days ago
Retailer 8
-
£964 GBP
$1,293 USD
View
Price last confirmed 14 days ago
Retailer 9
-
£1,030 GBP
$1,382 USD
View
Price last confirmed 15 days ago
Retailer 10
-
£1,346 GBP
$1,806 USD
View
Price last confirmed 14 days ago
Retailer 11
-
£1,370 GBP
ZAR 29,694 ZAR
View
Price last confirmed 14 days ago
Retailer 12
-
£1,621 GBP
$2,175 USD
View
Price last confirmed 14 days ago
Retailer 13
-
£1,917 GBP
$2,572 USD
View
Price last confirmed 13 days ago
Retailer 14
-
£2,112 GBP
View
Price last confirmed 14 days ago
Retailer 15
-
£2,292 GBP
SGD 4,157 SGD
View
Price last confirmed 14 days ago
Retailer 16
-
£2,356 GBP
$3,162 USD
View
Price last confirmed 13 days ago
Retailer 17
-
£2,569 GBP
View
Price last confirmed 14 days ago
Retailer 18
-
£2,600 GBP
$3,489 USD
View
Price last confirmed 113 days ago
Most Expensive
B
Brilliant Earth
16475887A · Nov 2
£4,210 GBP
$5,650 USD
View
18 more retailers have this diamond

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.

B
5.09ct Marquise
£4,210 GBP