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Marquise|Lab Grown|IGI

1.23ct D VS1 Marquise Lab Grown Diamond

VG • D/VS1 • IGI LG840664752

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG840664752

Diamond specifications and retailer prices

From £135 GBP
As of November 4, 2026
Save £707 GBP (84%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £842 GBP at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 1.23ct lab-grown marquise diamond

This 1.23ct lab-grown marquise sits in the classic one-carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG840664752 or 840664752. Listed at 21 retailers as of November 4, 2026, with prices from £135 to £842, a £707 spread on the same certified stone. Reve Diamonds lists it at £842. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
D
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840664752
Dimensions10.81 × 5.57 × 3.52 mm
L/W Ratio1.94
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.81 mm5.57 mm1.23 ctD / VS1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG840664752
Side View
Table 62.0%Crown 36.4°Girdle: MED-STKPavilion 41°Culet: NoneDepth 63.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £223 GBP|Low: £132 GBP|High: £851 GBP|Avg: £392 GBP|-3.2%
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Reve Diamonds
November 4, 2026
Retailer 14£135 GBP
Retailer 12£150 GBP
Retailer 18£156 GBP
Retailer 9£170 GBP
Retailer 10£190 GBP
Retailer 1£223 GBP
Retailer 6£281 GBP
Retailer 7£288 GBP
Retailer 17£296 GBP
Retailer 19£299 GBP
Retailer 13£351 GBP
Retailer 11£354 GBP
Retailer 2£427 GBP
Retailer 16£538 GBP
Retailer 8£541 GBP
Retailer 4£547 GBP
Retailer 3£558 GBP
Retailer 15£578 GBP
Retailer 20£644 GBP
Retailer 5£799 GBP
Reve Diamonds£842 GBP

29 data points across 21 retailers

21 retailers£135 GBP to £842 GBP

A
Cheapest Retailer
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£135 GBP
A
Retailer 2
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£150 GBP
View
Final sale: no returns
A
Retailer 3
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£156 GBP
View
Retailer 4
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£170 GBP
View
Price last confirmed 10 days ago
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Retailer 5
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£190 GBP
View
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Retailer 6
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£223 GBP
View
Retailer 7
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£281 GBP
View
Price last confirmed 8 days ago
Retailer 8
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£288 GBP
View
Price last confirmed 12 days ago
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Retailer 9
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£296 GBP
View
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Retailer 10
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£299 GBP
View
Retailer 11
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£351 GBP
View
Price last confirmed 8 days ago
Retailer 12
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£354 GBP
View
Price last confirmed 9 days ago
B+
Retailer 13
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£427 GBP
View
B+
Retailer 14
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£538 GBP
View
Retailer 15
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£541 GBP
View
Price last confirmed 7 days ago
B
Retailer 16
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£547 GBP
View
B
Retailer 17
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£558 GBP
View
B
Retailer 18
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£578 GBP
View
B
Retailer 19
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£644 GBP
View
Retailer 20
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£799 GBP
View
Price last confirmed 9 days ago
Most Expensive
B
Reve Diamonds
112672E73 · Nov 4
£842 GBP
$1,137 USD
View
20 more retailers have this diamond
Prices start from £135 GBPSave up to £707 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
1.23ct Marquise
£135 GBP