Marquise|Lab Grown|IGI

1.03ct F FL Marquise Lab Grown Diamond

VG • F/FL • IGI LG816615177

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG816615177

Diamond specifications and retailer prices

From £164 GBP
As of November 5, 2026
Save £1,240 GBP (88%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,486 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.03ct lab-grown marquise diamond

This 1.03ct lab-grown marquise sits in the classic one-carat band, graded F colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG816615177 or 816615177. Listed at 9 retailers as of November 5, 2026, with a 755% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.03
Carat
F
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816615177
Dimensions10.74 × 5.32 × 3.27 mm
L/W Ratio2.02
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
10.74 mm5.32 mm1.03 ctF / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816615177
Side View
Table 61.0%Crown 33.6°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.5%

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: Nov 5
Current: £1,486 GBP|Low: £164 GBP|High: £1,486 GBP|Avg: £699 GBP
Rare Carat
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
November 5, 2026
Retailer 8£164 GBP
Retailer 2£226 GBP
Retailer 12£257 GBP
Retailer 3£416 GBP
Retailer 4£446 GBP
Retailer 15£463 GBP
Retailer 6£467 GBP
Retailer 13£591 GBP
Retailer 10£645 GBP
Retailer 7£720 GBP
Retailer 11£802 GBP
Retailer 5£903 GBP
Retailer 14£1,018 GBP
Retailer 9£1,404 GBP
Rare Carat£1,486 GBP

11 data points across 15 retailers

9 retailers£164 GBP to £1,404 GBP

A
Cheapest Retailer
-
£164 GBP
Final sale: no returns
A
Retailer 2
-
£226 GBP
View
A
Retailer 3
-
£257 GBP
View
B+
Retailer 4
-
£591 GBP
View
B+
Retailer 5
-
£645 GBP
View
B
Retailer 6
-
£802 GBP
View
B
Retailer 7
-
£1,018 GBP
View
B
Retailer 8
-
£1,404 GBP
View
Most Expensive
Rare Carat
PD-227761 · Oct 28
£1,486 GBP
$2,000 USD
View
Price last confirmed 8 days ago
8 more retailers have this diamond
Prices start from £164 GBPSave up to £1,240 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
1.03ct Marquise
£164 GBP