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Marquise|Lab Grown|IGI

1.20ct E FL Marquise Lab Grown Diamond

ID • E/FL • IGI LG800680286

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG800680286

Diamond specifications and retailer prices

From £506 GBP
HK$5,300 HKD
As of October 31, 2026
Save £1,212 GBP (71%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,719 GBP at With Clarity · As of October 31, 2026
View at With Clarity

About this 1.2ct lab-grown marquise diamond

This 1.2ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG800680286 or 800680286. Listed at 13 retailers as of October 31, 2026, with prices from £506 to £1,719, a £1,212 spread on the same certified stone. With Clarity lists it at £1,719. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800680286
Dimensions10.83 × 5.59 × 3.52 mm
L/W Ratio1.94
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
10.83 mm5.59 mm1.20 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800680286
Side View
Table 57.0%Crown 33.4°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £727 GBP|Low: £378 GBP|High: £2,119 GBP|Avg: £1,037 GBP|-4.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
With Clarity
November 1, 2026
Retailer 3£506 GBP
Retailer 9£605 GBP
Retailer 2£619 GBP
Retailer 12£637 GBP
Retailer 5£676 GBP
Retailer 1£727 GBP
Retailer 4£780 GBP
Retailer 11£1,025 GBP
Retailer 10£1,431 GBP
Retailer 6£1,619 GBP
Retailer 7£1,627 GBP
Retailer 8£1,690 GBP
With Clarity£1,719 GBP

42 data points across 13 retailers

13 retailers£506 GBP to £1,719 GBP

A
Cheapest Retailer
-
£506 GBP
HK$5,300 HKD
A
Retailer 2
-
£605 GBP
$810 USD
View
B+
Retailer 3
-
£619 GBP
$830 USD
View
A
Retailer 4
-
£637 GBP
$853 USD
View
B+
Retailer 5
-
£676 GBP
€862 EUR
View
B+
Retailer 6
-
£727 GBP
View
B+
Retailer 7
-
£780 GBP
A$1,608 AUD
View
Retailer 8
-
£1,025 GBP
$1,373 USD
View
Price last confirmed 8 days ago
B
Retailer 9
-
£1,431 GBP
$1,917 USD
View
B
Retailer 10
-
£1,619 GBP
View
B
Retailer 11
-
£1,627 GBP
$2,180 USD
View
B
Retailer 12
-
£1,690 GBP
$2,265 USD
View
Most Expensive
B
With Clarity
800680286 · Oct 31
£1,719 GBP
$2,303 USD
View
12 more retailers have this diamond
Prices start from £506 GBPSave up to £1,212 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
1.20ct Marquise
£506 GBP