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Round|Lab Grown|IGI

1.67ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG515228758

Shape and cutting style on the report: Round brilliant

Certificate IGI LG515228758

Diamond specifications and retailer prices

From £240 GBP
$320 USD
As of October 29, 2026
Save £1,052 GBP (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £2,133 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

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 LG515228758 or 515228758. Listed at 18 retailers as of October 29, 2026, with a 438% 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

1.67
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG515228758
Dimensions7.65 × 7.60 × 4.71 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.65 mm7.60 mm1.67 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG515228758
Side View
Table 58.0%Crown 35.4°Girdle: THN-MEDPavilion 41°Culet: NoneDepth 61.8%

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: Oct 29
Current: £2,133 GBP|Low: £240 GBP|High: £2,133 GBP|Avg: £730 GBP
Do Amore Diamonds
Retailer 2
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Retailer 12
Retailer 13
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Retailer 18
October 30, 2026
Retailer 15£240 GBP
Retailer 14£279 GBP
Retailer 13£298 GBP
Retailer 18£298 GBP
Retailer 16£312 GBP
Retailer 9£389 GBP
Retailer 4£413 GBP
Retailer 5£537 GBP
Retailer 12£571 GBP
Retailer 2£590 GBP
Retailer 7£618 GBP
Retailer 10£671 GBP
Retailer 3£874 GBP
Retailer 17£1,057 GBP
Retailer 6£1,084 GBP
Retailer 8£1,176 GBP
Retailer 11£1,292 GBP
Do Amore Diamonds£2,133 GBP

14 data points across 18 retailers

18 retailers£240 GBP to £1,292 GBP

A
Cheapest Retailer
-
£240 GBP
$320 USD
A
Retailer 2
-
£279 GBP
$371 USD
View
A
Retailer 3
-
£298 GBP
$397 USD
View
A
Retailer 4
-
£298 GBP
$397 USD
View
A
Retailer 5
-
£312 GBP
$415 USD
View
A
Retailer 6
-
£389 GBP
$518 USD
View
A
Retailer 7
-
£413 GBP
$550 USD
View
B+
Retailer 8
-
£537 GBP
$715 USD
View
B+
Retailer 9
-
£571 GBP
View
B+
Retailer 10
-
£590 GBP
View
B+
Retailer 11
-
£618 GBP
$823 USD
View
B+
Retailer 12
-
£671 GBP
$894 USD
View
B
Retailer 13
-
£874 GBP
$1,164 USD
View
B
Retailer 14
-
£1,057 GBP
$1,408 USD
View
B
Retailer 15
-
£1,084 GBP
$1,443 USD
View
B
Retailer 16
-
£1,176 GBP
$1,566 USD
View
B
Retailer 17
-
£1,292 GBP
View
Most Expensive
Do Amore Diamonds
27-508475D7A · Oct 29
£2,133 GBP
$2,840 USD
View
Price under review
17 more retailers have this diamond
Prices start from £240 GBPSave up to £1,052 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
£240 GBP