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Round|Lab Grown|IGI

1.67ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG669420558

Shape and cutting style on the report: Round brilliant

Certificate IGI LG669420558

Diamond specifications and retailer prices

From £148 GBP
$197 USD
As of October 29, 2026
Save £714 GBP (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £862 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.67ct lab-grown round diamond

This 1.67ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG669420558 or 669420558. Listed at 14 retailers as of October 29, 2026, with prices from £148 to £862, a £714 spread on the same certified stone. MOH London lists it at £862. 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

1.67
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG669420558
Dimensions7.62 × 7.54 × 4.73 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.62 mm7.54 mm1.67 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG669420558
Side View
Table 56.0%Crown 33.7°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.3%

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: Oct 29
Current: £862 GBP|Low: £138 GBP|High: £862 GBP|Avg: £403 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 30, 2026
Retailer 7£138 GBP
Retailer 15£148 GBP
Retailer 13£171 GBP
Retailer 12£183 GBP
Retailer 9£308 GBP
Retailer 8£318 GBP
Retailer 14£320 GBP
Retailer 2£335 GBP
Retailer 11£374 GBP
Retailer 3£381 GBP
Retailer 5£469 GBP
Retailer 4£552 GBP
Retailer 10£589 GBP
Retailer 6£721 GBP
MOH London£862 GBP

17 data points across 15 retailers

14 retailers£148 GBP to £862 GBP

A
Cheapest Retailer
-
£148 GBP
$197 USD
A
Retailer 2
-
£171 GBP
$228 USD
View
A
Retailer 3
-
£183 GBP
$244 USD
View
A
Retailer 4
-
£308 GBP
€390 EUR
View
A
Retailer 5
-
£318 GBP
View
B+
Retailer 6
-
£320 GBP
$426 USD
View
A
Retailer 7
-
£335 GBP
View
A
Retailer 8
-
£374 GBP
$498 USD
View
A
Retailer 9
-
£381 GBP
$508 USD
View
B+
Retailer 10
-
£469 GBP
$624 USD
View
Retailer 11
-
£552 GBP
$735 USD
View
Price last confirmed 12 days ago
B+
Retailer 12
-
£589 GBP
$785 USD
View
B
Retailer 13
-
£721 GBP
$960 USD
View
Most Expensive
B
MOH London
LG669420558 · Oct 29
£862 GBP
View
13 more retailers have this diamond
Prices start from £148 GBPSave up to £714 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
1.67ct Round
£148 GBP