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Marquise|Lab Grown|IGI

1.55ct E SI1 Marquise Lab Grown Diamond

VG • E/SI1 • IGI LG853620908

Certificate IGI LG853620908

Diamond specifications and retailer prices

From £331 GBP
As of November 6, 2026
Save £19 GBP (5%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £350 GBP at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 1.55ct lab-grown marquise diamond

This 1.55ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG853620908 or 853620908. Listed at 2 retailers as of November 6, 2026, with a relatively tight 6% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.55
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
Polish
Symmetry
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG853620908
Dimensions11.52 × 6.09 × 3.79 mm
L/W Ratio1.89
Top View
11.52 mm6.09 mm1.55 ctE / SI1
OriginLab Grown
CutVery Good
FluorescenceNone
CertificateIGI LG853620908
Side View
Table 60.0%CrownGirdlePavilionCuletDepth 62.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: £350 GBP|Low: £331 GBP|High: £350 GBP|Avg: £341 GBP
77 Diamonds
Retailer 2
November 6, 2026
Retailer 2£331 GBP
77 Diamonds£350 GBP

1 data point across 2 retailers

2 retailers£331 GBP to £350 GBP

B
Cheapest Retailer
-
£331 GBP
Most Expensive
B
77 Diamonds
MQPUIFSJAHRZCHC · Nov 6
£350 GBP
View
1 more retailer has this diamond
Prices start from £331 GBPSave up to £19 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.

B
1.55ct Marquise
£331 GBP