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Round|Lab Grown|IGI

1.60ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG818687021

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818687021

Diamond specifications and retailer prices

From £158 GBP
$212 USD
As of November 1, 2026
Save £528 GBP (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £785 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.6ct lab-grown round diamond

This 1.6ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818687021 or 818687021. Listed at 16 retailers as of November 1, 2026, with a 334% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.60
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818687021
Dimensions7.48 × 7.53 × 4.59 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
7.48 mm7.53 mm1.60 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818687021
Side View
Table 59.0%Crown 35.1°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £785 GBP|Low: £151 GBP|High: £793 GBP|Avg: £426 GBP|-1.1%
MOH London
Retailer 2
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Retailer 11
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Retailer 16
November 3, 2026
Retailer 13£158 GBP
Retailer 15£183 GBP
Retailer 3£195 GBP
Retailer 4£195 GBP
Retailer 10£330 GBP
Retailer 16£336 GBP
Retailer 6£352 GBP
Retailer 2£358 GBP
Retailer 11£359 GBP
Retailer 7£388 GBP
Retailer 9£515 GBP
Retailer 12£581 GBP
Retailer 5£628 GBP
Retailer 8£668 GBP
Retailer 14£686 GBP
MOH London£785 GBP

32 data points across 16 retailers

16 retailers£158 GBP to £686 GBP

A
Cheapest Retailer
-
£158 GBP
$212 USD
A
Retailer 2
-
£183 GBP
$245 USD
View
A
Retailer 3
-
£195 GBP
$262 USD
View
Retailer 4
-
£195 GBP
$262 USD
View
Price last confirmed 9 days ago
A
Retailer 5
-
£330 GBP
€422 EUR
View
B+
Retailer 6
-
£336 GBP
$451 USD
View
A
Retailer 7
-
£352 GBP
$473 USD
View
A
Retailer 8
-
£358 GBP
View
A
Retailer 9
-
£359 GBP
View
A
Retailer 10
-
£388 GBP
$521 USD
View
B+
Retailer 11
-
£515 GBP
$691 USD
View
B+
Retailer 12
-
£581 GBP
$780 USD
View
B+
Retailer 13
-
£628 GBP
$843 USD
View
B
Retailer 14
-
£668 GBP
$897 USD
View
B
Retailer 15
-
£686 GBP
$920 USD
View
Most Expensive
MOH London
LG818687021 · Oct 26
£785 GBP
View
Price last confirmed 7 days ago
15 more retailers have this diamond
Prices start from £158 GBPSave up to £528 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
1.60ct Round
£158 GBP