Marquise|Lab Grown|IGI

1.20ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG825640531

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG825640531

Diamond specifications and retailer prices

From £187 GBP
$251 USD
As of October 30, 2026
Save £825 GBP (81%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,168 GBP at Rare Carat · As of October 21, 2026
View at Rare Carat

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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG825640531 or 825640531. Listed at 21 retailers as of October 30, 2026, with a 440% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825640531
Dimensions10.66 × 5.58 × 3.52 mm
L/W Ratio1.91
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
10.66 mm5.58 mm1.20 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825640531
Side View
Table 58.0%Crown 34.3°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 63.1%

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: Oct 30
Current: £1,168 GBP|Low: £187 GBP|High: £1,517 GBP|Avg: £608 GBP|-1.6%
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
Retailer 16
Retailer 17
November 1, 2026
Retailer 6£187 GBP
Retailer 7£209 GBP
Retailer 3£232 GBP
Retailer 15£232 GBP
Retailer 8£313 GBP
Retailer 11£351 GBP
Retailer 17£398 GBP
Retailer 13£399 GBP
Retailer 10£442 GBP
Retailer 14£565 GBP
Retailer 4£579 GBP
Retailer 12£580 GBP
Retailer 16£746 GBP
Retailer 5£785 GBP
Retailer 2£931 GBP
Retailer 9£1,012 GBP
Rare Carat£1,168 GBP

39 data points across 17 retailers

21 retailers£187 GBP to £1,012 GBP

A
Cheapest Retailer
-
£187 GBP
$251 USD
A
Retailer 2
-
£209 GBP
$280 USD
View
Final sale: no returns
Retailer 3
-
£224 GBP
$300 USD
View
Price last confirmed 24 days ago
Retailer 4
-
£232 GBP
$311 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
£232 GBP
$311 USD
View
Retailer 6
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£260 GBP
$348 USD
View
Price last confirmed 34 days ago
Retailer 7
-
£278 GBP
$372 USD
View
Price last confirmed 29 days ago
A
Retailer 8
-
£313 GBP
$420 USD
View
A
Retailer 9
-
£351 GBP
$470 USD
View
A
Retailer 10
-
£398 GBP
€508 EUR
View
A
Retailer 11
-
£399 GBP
ZAR 8,633 ZAR
View
A
Retailer 12
-
£442 GBP
View
B+
Retailer 13
-
£565 GBP
A$1,165 AUD
View
B+
Retailer 14
-
£579 GBP
$776 USD
View
B+
Retailer 15
-
£580 GBP
$777 USD
View
B+
Retailer 16
-
£746 GBP
$1,000 USD
View
B+
Retailer 17
-
£785 GBP
$1,052 USD
View
Retailer 18
-
£892 GBP
$1,195 USD
View
Price last confirmed 32 days ago
B+
Retailer 19
-
£931 GBP
View
B+
Retailer 20
-
£1,012 GBP
$1,356 USD
View
Most Expensive
Rare Carat
NJ33 202 · Oct 21
£1,168 GBP
$1,565 USD
View
Price last confirmed 11 days ago
20 more retailers have this diamond
Prices start from £187 GBPSave up to £825 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
£187 GBP