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Marquise|Lab Grown|IGI

0.51ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG816662575

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG816662575

Diamond specifications and retailer prices

From £172 GBP
As of November 4, 2026
Save £788 GBP (82%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £961 GBP at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 0.51ct lab-grown marquise diamond

This 0.51ct lab-grown marquise sits in the half to three-quarter carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816662575 or 816662575. Listed at 17 retailers as of November 4, 2026, with prices from £172 to £961, a £788 spread on the same certified stone. Reve Diamonds lists it at £961. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816662575
Dimensions7.84 × 4.24 × 2.68 mm
L/W Ratio1.85
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.84 mm4.24 mm0.51 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816662575
Side View
Table 61.0%Crown 36.5°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 63.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £941 GBP|Low: £172 GBP|High: £968 GBP|Avg: £519 GBP|-2.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 9
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Retailer 11
Retailer 12
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Retailer 16
Reve Diamonds
November 5, 2026
Retailer 2£172 GBP
Retailer 3£192 GBP
Retailer 16£200 GBP
Retailer 7£211 GBP
Retailer 11£213 GBP
Retailer 8£290 GBP
Retailer 13£368 GBP
Retailer 14£386 GBP
Retailer 5£427 GBP
Retailer 12£428 GBP
Retailer 4£448 GBP
Retailer 6£687 GBP
Retailer 9£757 GBP
Retailer 10£883 GBP
Retailer 15£924 GBP
Retailer 1£941 GBP
Reve Diamonds£961 GBP

31 data points across 17 retailers

17 retailers£172 GBP to £961 GBP

A
Cheapest Retailer
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£172 GBP
A
Retailer 2
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£192 GBP
View
Final sale: no returns
A
Retailer 3
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£200 GBP
View
A
Retailer 4
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£211 GBP
View
A
Retailer 5
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£213 GBP
View
A
Retailer 6
-
£290 GBP
View
B+
Retailer 7
-
£368 GBP
View
B+
Retailer 8
-
£386 GBP
View
B+
Retailer 9
-
£427 GBP
View
B+
Retailer 10
-
£428 GBP
View
Retailer 11
-
£448 GBP
View
Price last confirmed 11 days ago
B
Retailer 12
-
£687 GBP
View
B
Retailer 13
-
£757 GBP
View
B
Retailer 14
-
£883 GBP
View
B
Retailer 15
-
£924 GBP
View
B
Retailer 16
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£941 GBP
View
Most Expensive
B
Reve Diamonds
45B96CC16 · Nov 4
£961 GBP
$1,293 USD
View
16 more retailers have this diamond
Prices start from £172 GBPSave up to £788 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
0.51ct Marquise
£172 GBP