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Marquise|Lab Grown|IGI

1.21ct D VS1 Marquise Lab Grown Diamond

ID • D/VS1 • IGI LG841674554

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG841674554

Diamond specifications and retailer prices

From £150 GBP
As of November 4, 2026
Save £806 GBP (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £956 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG841674554 or 841674554. Listed at 19 retailers as of October 30, 2026, with prices from £150 to £956, a £806 spread on the same certified stone. Brilliant Earth lists it at £956. 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
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.8°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841674554
Dimensions10.90 × 5.59 × 3.45 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.90 mm5.59 mm1.21 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841674554
Side View
Table 61.0%Crown 30.8°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 61.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £956 GBP|Low: £150 GBP|High: £956 GBP|Avg: £422 GBP
Brilliant Earth
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
Retailer 18
November 4, 2026
Retailer 3£150 GBP
Retailer 8£167 GBP
Retailer 6£185 GBP
Retailer 9£185 GBP
Retailer 2£247 GBP
Retailer 7£250 GBP
Retailer 14£319 GBP
Retailer 18£322 GBP
Retailer 11£336 GBP
Retailer 5£345 GBP
Retailer 12£374 GBP
Retailer 16£448 GBP
Retailer 13£451 GBP
Retailer 17£582 GBP
Retailer 4£634 GBP
Retailer 15£865 GBP
Retailer 10£887 GBP
Brilliant Earth£956 GBP

31 data points across 18 retailers

19 retailers£150 GBP to £956 GBP

A
Cheapest Retailer
-
£150 GBP
A
Retailer 2
-
£167 GBP
View
Final sale: no returns
A
Retailer 3
-
£185 GBP
View
Retailer 4
-
£185 GBP
View
Price last confirmed 10 days ago
A
Retailer 5
-
£247 GBP
View
B+
Retailer 6
-
£250 GBP
View
A
Retailer 7
-
£319 GBP
View
Retailer 8
-
£322 GBP
View
Price last confirmed 8 days ago
A
Retailer 9
-
£336 GBP
View
A
Retailer 10
-
£345 GBP
View
A
Retailer 11
-
£374 GBP
View
B+
Retailer 12
-
£448 GBP
View
B+
Retailer 13
-
£451 GBP
View
Retailer 14
-
£563 GBP
View
Price last confirmed 28 days ago
Retailer 15
-
£582 GBP
View
Price last confirmed 8 days ago
B
Retailer 16
-
£634 GBP
View
B
Retailer 17
-
£865 GBP
View
B
Retailer 18
-
£887 GBP
View
Most Expensive
B
Brilliant Earth
21789863A · Oct 30
£956 GBP
$1,290 USD
View
18 more retailers have this diamond
Prices start from £150 GBPSave up to £806 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
£150 GBP