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Marquise|Lab Grown|IGI

1.21ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG838645049

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG838645049

Diamond specifications and retailer prices

From £242 GBP
As of November 4, 2026
Save £1,565 GBP (87%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £1,807 GBP at Do Amore Diamonds · As of November 4, 2026
View at Do Amore Diamonds

About this 1.21ct lab-grown marquise diamond

This 1.21ct 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 LG838645049 or 838645049. Listed at 27 retailers as of November 4, 2026, with prices from £242 to £1,807, a £1,565 spread on the same certified stone. Do Amore Diamonds lists it at £1,807. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG838645049
Dimensions10.48 × 5.58 × 3.49 mm
L/W Ratio1.88
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
10.48 mm5.58 mm1.21 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG838645049
Side View
Table 61.0%Crown 34.5°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.5%

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 4
Current: £1,807 GBP|Low: £227 GBP|High: £1,807 GBP|Avg: £737 GBP
Do Amore Diamonds
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November 5, 2026
Retailer 3£242 GBP
Retailer 14£271 GBP
Retailer 15£281 GBP
Retailer 20£281 GBP
Retailer 5£300 GBP
Retailer 23£340 GBP
Retailer 9£371 GBP
Retailer 6£415 GBP
Retailer 19£439 GBP
Retailer 18£444 GBP
Retailer 11£457 GBP
Retailer 8£496 GBP
Retailer 29£544 GBP
Retailer 28£571 GBP
Retailer 2£591 GBP
Retailer 26£717 GBP
Retailer 13£809 GBP
Retailer 25£841 GBP
Retailer 17£918 GBP
Retailer 4£986 GBP
Retailer 22£1,005 GBP
Retailer 10£1,066 GBP
Retailer 12£1,164 GBP
Retailer 16£1,180 GBP
Retailer 24£1,181 GBP
Retailer 21£1,260 GBP
Retailer 27£1,295 GBP
Retailer 7£1,735 GBP
Do Amore Diamonds£1,807 GBP

21 data points across 29 retailers

27 retailers£242 GBP to £1,807 GBP

A
Cheapest Retailer
-
£242 GBP
A
Retailer 2
-
£271 GBP
View
Final sale: no returns
Retailer 3
-
£281 GBP
View
Price last confirmed 24 days ago
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Retailer 4
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£281 GBP
View
A
Retailer 5
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£300 GBP
View
A
Retailer 6
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£340 GBP
View
A
Retailer 7
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£371 GBP
View
A
Retailer 8
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£415 GBP
View
A
Retailer 9
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£444 GBP
View
A
Retailer 10
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£446 GBP
View
A
Retailer 11
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£457 GBP
View
B+
Retailer 12
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£544 GBP
View
B+
Retailer 13
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£571 GBP
View
B+
Retailer 14
-
£591 GBP
View
B+
Retailer 15
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£717 GBP
View
B+
Retailer 16
-
£809 GBP
View
B+
Retailer 17
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£841 GBP
View
B+
Retailer 18
-
£918 GBP
View
B+
Retailer 19
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£986 GBP
View
B
Retailer 20
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£1,066 GBP
View
B
Retailer 21
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£1,164 GBP
View
B
Retailer 22
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£1,180 GBP
View
B
Retailer 23
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£1,181 GBP
View
Retailer 24
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£1,260 GBP
View
Price last confirmed 28 days ago
B
Retailer 25
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£1,295 GBP
View
B
Retailer 26
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£1,735 GBP
View
Most Expensive
B
Do Amore Diamonds
20-E101725 · Nov 4
£1,807 GBP
$2,440 USD
View
26 more retailers have this diamond
Prices start from £242 GBPSave up to £1,565 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
1.21ct Marquise
£242 GBP