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Marquise|Lab Grown|IGI

1.20ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG799676768

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG799676768

Diamond specifications and retailer prices

From £384 GBP
As of November 4, 2026
Save £1,787 GBP (82%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £2,170 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.2ct lab-grown marquise diamond

This 1.2ct lab-grown marquise sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG799676768 or 799676768. Listed at 23 retailers as of November 4, 2026, with prices from £384 to £2,170, a £1,787 spread on the same certified stone. Brilliant Earth lists it at £2,170. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799676768
Dimensions11.25 × 5.53 × 3.39 mm
L/W Ratio2.03
Girdle conditionFaceted
Culet sizePointed
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
11.25 mm5.53 mm1.20 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799676768
Side View
Table 58.0%Crown 33.3°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 61.3%

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 4
Current: £2,170 GBP|Low: £384 GBP|High: £2,430 GBP|Avg: £1,035 GBP
Brilliant Earth
Retailer 2
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November 5, 2026
Retailer 15£384 GBP
Retailer 6£430 GBP
Retailer 10£430 GBP
Retailer 5£476 GBP
Retailer 21£521 GBP
Retailer 18£578 GBP
Retailer 4£630 GBP
Retailer 9£630 GBP
Retailer 19£724 GBP
Retailer 13£730 GBP
Retailer 11£739 GBP
Retailer 16£821 GBP
Retailer 17£1,160 GBP
Retailer 20£1,167 GBP
Retailer 3£1,228 GBP
Retailer 22£1,252 GBP
Retailer 8£1,388 GBP
Retailer 14£1,507 GBP
Retailer 7£1,547 GBP
Retailer 12£1,636 GBP
Retailer 2£1,982 GBP
Brilliant Earth£2,170 GBP

42 data points across 22 retailers

23 retailers£384 GBP to £2,170 GBP

A
Cheapest Retailer
-
£384 GBP
A
Retailer 2
-
£430 GBP
View
Final sale: no returns
A
Retailer 3
-
£430 GBP
View
Retailer 4
-
£476 GBP
View
Price last confirmed 20 days ago
A
Retailer 5
-
£476 GBP
View
A
Retailer 6
-
£521 GBP
View
B+
Retailer 7
-
£578 GBP
View
B+
Retailer 8
-
£630 GBP
View
B+
Retailer 9
-
£630 GBP
View
Retailer 10
-
£724 GBP
View
Price last confirmed 9 days ago
B+
Retailer 11
-
£730 GBP
View
B+
Retailer 12
-
£739 GBP
View
B+
Retailer 13
-
£821 GBP
View
B
Retailer 14
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£1,160 GBP
View
Retailer 15
-
£1,167 GBP
View
Price last confirmed 8 days ago
B
Retailer 16
-
£1,228 GBP
View
B+
Retailer 17
-
£1,252 GBP
View
B
Retailer 18
-
£1,388 GBP
View
B
Retailer 19
-
£1,507 GBP
View
B
Retailer 20
-
£1,547 GBP
View
B
Retailer 21
-
£1,636 GBP
View
B
Retailer 22
-
£1,982 GBP
View
Most Expensive
B
Brilliant Earth
19804118A · Nov 4
£2,170 GBP
$2,930 USD
View
22 more retailers have this diamond
Prices start from £384 GBPSave up to £1,787 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
£384 GBP