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1.55ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG478112353

Shape and cutting style on the report: Round brilliant

Certificate IGI LG478112353

Diamond specifications and retailer prices

From £716 GBP
As of November 5, 2026
Save £2,095 GBP (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,811 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.55ct lab-grown round diamond

This 1.55ct lab-grown round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG478112353 or 478112353. Listed at 9 retailers as of November 5, 2026, with prices from £716 to £2,811, a £2,095 spread on the same certified stone. MOH London lists it at £2,811. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.9°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478112353
Dimensions7.56 × 7.59 × 4.52 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
Faint Brown This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.56 mm7.59 mm1.55 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478112353
Side View
Table 60.5%Crown 31.9°Girdle: THN-MEDPavilion 41.5°Culet: NoneDepth 59.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £2,811 GBP|Low: £716 GBP|High: £2,856 GBP|Avg: £1,506 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 4£716 GBP
Retailer 5£831 GBP
Retailer 2£962 GBP
Retailer 7£1,219 GBP
Retailer 6£1,328 GBP
Retailer 3£1,791 GBP
MOH London£2,811 GBP

19 data points across 7 retailers

9 retailers£716 GBP to £2,811 GBP

A
Cheapest Retailer
-
£716 GBP
A
Retailer 2
-
£779 GBP
View
B+
Retailer 3
-
£831 GBP
View
Retailer 4
-
£831 GBP
View
Price last confirmed 25 days ago
B+
Retailer 5
-
£962 GBP
View
B
Retailer 6
-
£1,328 GBP
View
B
Retailer 7
-
£1,791 GBP
View
B
Retailer 8
-
£2,336 GBP
View
Most Expensive
B
MOH London
LG478112353 · Nov 5
£2,811 GBP
View
8 more retailers have this diamond
Prices start from £716 GBPSave up to £2,095 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
1.55ct Round
£716 GBP