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Marquise|Lab Grown|IGI

0.99ct F SI1 Marquise Lab Grown Diamond

EX • F/SI1 • IGI LG786683727

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG786683727

Diamond specifications and retailer prices

From £143 GBP
HK$1,500 HKD
As of November 1, 2026
Save £282 GBP (66%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £600 GBP at MOH London · As of October 25, 2026
View at MOH London

About this 0.99ct lab-grown marquise diamond

This 0.99ct lab-grown marquise sits in the just-under-one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG786683727 or 786683727. Listed at 17 retailers as of November 1, 2026, with a 197% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.99
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.9°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786683727
Dimensions10.56 × 5.23 × 3.12 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
10.56 mm5.23 mm0.99 ctF / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG786683727
Side View
Table 59.0%Crown 33.9°Girdle: THN-MEDPavilion 38.9°Culet: NoneDepth 59.7%

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 1
Current: £600 GBP|Low: £99 GBP|High: £626 GBP|Avg: £292 GBP|-0.9%
MOH London
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 6£104 GBP
Retailer 5£120 GBP
Retailer 17£128 GBP
Retailer 7£143 GBP
Retailer 14£170 GBP
Retailer 15£217 GBP
Retailer 4£221 GBP
Retailer 2£230 GBP
Retailer 8£240 GBP
Retailer 16£275 GBP
Retailer 9£311 GBP
Retailer 10£320 GBP
Retailer 12£350 GBP
Retailer 13£350 GBP
Retailer 3£412 GBP
Retailer 11£425 GBP
MOH London£600 GBP

43 data points across 17 retailers

17 retailers£143 GBP to £425 GBP

Retailer 1
-
£104 GBP
$139 USD
Price last confirmed 10 days ago
Retailer 2
-
£120 GBP
$161 USD
View
Price last confirmed 9 days ago
Retailer 3
-
£128 GBP
$172 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
£143 GBP
HK$1,500 HKD
View
A
Retailer 5
-
£170 GBP
View
A
Retailer 6
-
£217 GBP
View
Retailer 7
-
£221 GBP
€282 EUR
View
Price last confirmed 8 days ago
A
Retailer 8
-
£230 GBP
$308 USD
View
Retailer 9
-
£240 GBP
$322 USD
View
Price last confirmed 8 days ago
Retailer 10
-
£275 GBP
View
Price last confirmed 7 days ago
Retailer 11
-
£311 GBP
$417 USD
View
Price last confirmed 7 days ago
B+
Retailer 12
-
£320 GBP
$429 USD
View
B+
Retailer 13
-
£350 GBP
SGD 635 SGD
View
B+
Retailer 14
-
£350 GBP
$470 USD
View
Retailer 15
-
£412 GBP
$553 USD
View
Price last confirmed 8 days ago
B
Retailer 16
-
£425 GBP
$570 USD
View
Most Expensive
MOH London
LG786683727 · Oct 25
£600 GBP
View
Price last confirmed 8 days ago
16 more retailers have this diamond
Prices start from £143 GBPSave up to £282 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
0.99ct Marquise
£143 GBP