CaratHunter
Plans
Round|Lab Grown|IGI

1.55ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG816613920

Shape and cutting style on the report: Round brilliant

Certificate IGI LG816613920

Diamond specifications and retailer prices

From £143 GBP
$192 USD
As of November 1, 2026
Save £687 GBP (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £830 GBP at MOH London · As of November 1, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816613920 or 816613920. Listed at 15 retailers as of November 1, 2026, with prices from £143 to £830, a £687 spread on the same certified stone. MOH London lists it at £830. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816613920
Dimensions7.46 × 7.40 × 4.58 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.46 mm7.40 mm1.55 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816613920
Side View
Table 55.0%Crown 34.8°Girdle: MediumPavilion 40.6°Culet: NoneDepth 61.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £830 GBP|Low: £143 GBP|High: £840 GBP|Avg: £409 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 7£143 GBP
Retailer 9£178 GBP
Retailer 4£298 GBP
Retailer 10£310 GBP
Retailer 3£316 GBP
Retailer 2£322 GBP
Retailer 6£451 GBP
Retailer 5£530 GBP
Retailer 8£657 GBP
MOH London£830 GBP

44 data points across 10 retailers

15 retailers£143 GBP to £830 GBP

A
Cheapest Retailer
-
£143 GBP
$192 USD
A
Retailer 2
-
£166 GBP
$223 USD
View
Retailer 3
-
£178 GBP
$238 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
£178 GBP
$238 USD
View
A
Retailer 5
-
£298 GBP
€380 EUR
View
B+
Retailer 6
-
£310 GBP
$415 USD
View
A
Retailer 7
-
£316 GBP
View
A
Retailer 8
-
£322 GBP
View
A
Retailer 9
-
£353 GBP
$473 USD
View
B+
Retailer 10
-
£451 GBP
$604 USD
View
B+
Retailer 11
-
£530 GBP
$710 USD
View
B
Retailer 12
-
£571 GBP
$765 USD
View
B+
Retailer 13
-
£611 GBP
$818 USD
View
B
Retailer 14
-
£657 GBP
$880 USD
View
Most Expensive
B
MOH London
LG816613920 · Nov 1
£830 GBP
View
14 more retailers have this diamond
Prices start from £143 GBPSave up to £687 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
£143 GBP