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Round|Lab Grown|IGI

1.74ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG668409277

Shape and cutting style on the report: Round brilliant

Certificate IGI LG668409277

Diamond specifications and retailer prices

From £167 GBP
$222 USD
As of October 29, 2026
Save £945 GBP (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,111 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.74ct lab-grown round diamond

This 1.74ct 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 LG668409277 or 668409277. Listed at 14 retailers as of October 29, 2026, with prices from £167 to £1,111, a £945 spread on the same certified stone. Brilliant Earth lists it at £1,111. 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

1.74
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG668409277
Dimensions7.81 × 7.74 × 4.72 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
7.81 mm7.74 mm1.74 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG668409277
Side View
Table 59.0%Crown 33.3°Girdle: MediumPavilion 41.2°Culet: NoneDepth 60.8%

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: £1,111 GBP|Low: £156 GBP|High: £1,111 GBP|Avg: £423 GBP|+2.8%
Brilliant Earth
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
October 29, 2026
Retailer 13£167 GBP
Retailer 6£182 GBP
Retailer 10£194 GBP
Retailer 5£207 GBP
Retailer 9£207 GBP
Retailer 11£354 GBP
Retailer 7£372 GBP
Retailer 2£383 GBP
Retailer 3£404 GBP
Retailer 14£407 GBP
Retailer 4£666 GBP
Retailer 12£668 GBP
Retailer 8£831 GBP
Brilliant Earth£1,111 GBP

42 data points across 14 retailers

14 retailers£167 GBP to £1,111 GBP

A
Cheapest Retailer
-
£167 GBP
$222 USD
A
Retailer 2
-
£182 GBP
$243 USD
View
Final sale: no returns
A
Retailer 3
-
£194 GBP
$258 USD
View
A
Retailer 4
-
£207 GBP
$276 USD
View
A
Retailer 5
-
£207 GBP
$276 USD
View
B+
Retailer 6
-
£354 GBP
$471 USD
View
A
Retailer 7
-
£372 GBP
€472 EUR
View
A
Retailer 8
-
£383 GBP
View
A
Retailer 9
-
£404 GBP
$538 USD
View
A
Retailer 10
-
£407 GBP
$542 USD
View
B
Retailer 11
-
£666 GBP
$887 USD
View
B+
Retailer 12
-
£668 GBP
$890 USD
View
B
Retailer 13
-
£831 GBP
View
Most Expensive
B
Brilliant Earth
13161355A · Oct 29
£1,111 GBP
$1,480 USD
View
13 more retailers have this diamond
Prices start from £167 GBPSave up to £945 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
1.74ct Round
£167 GBP