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Princess|Lab Grown|IGI

1.51ct E SI1 Princess Lab Grown Diamond

ID • E/SI1 • IGI LG648452613

Shape and cutting style on the report: Princess cut

Certificate IGI LG648452613

Diamond specifications and retailer prices

From £143 GBP
$190 USD
As of October 30, 2026
Save £736 GBP (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £879 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.51ct lab-grown princess diamond

This 1.51ct lab-grown princess 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 LG648452613 or 648452613. Listed at 18 retailers as of October 29, 2026, with prices from £143 to £879, a £736 spread on the same certified stone. Brilliant Earth lists it at £879. 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

1.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.5°
Pavilion angle36.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG648452613
Dimensions6.36 × 6.35 × 4.15 mm
L/W Ratio1.00
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.36 mm6.35 mm1.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG648452613
Side View
Table 71.0%Crown 40.5°Girdle: Slightly ThickPavilion 36.1°Culet: NoneDepth 65.4%

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 30
Current: £879 GBP|Low: £137 GBP|High: £901 GBP|Avg: £415 GBP
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
Retailer 15
Retailer 16
October 30, 2026
Retailer 9£143 GBP
Retailer 6£158 GBP
Retailer 4£165 GBP
Retailer 11£176 GBP
Retailer 16£176 GBP
Retailer 13£228 GBP
Retailer 5£242 GBP
Retailer 2£321 GBP
Retailer 10£330 GBP
Retailer 8£371 GBP
Retailer 14£568 GBP
Retailer 15£571 GBP
Retailer 3£683 GBP
Retailer 12£831 GBP
Retailer 7£872 GBP
Brilliant Earth£879 GBP

38 data points across 16 retailers

18 retailers£143 GBP to £879 GBP

A
Cheapest Retailer
-
£143 GBP
$190 USD
A
Retailer 2
-
£158 GBP
$211 USD
View
Final sale: no returns
A
Retailer 3
-
£165 GBP
$220 USD
View
A
Retailer 4
-
£176 GBP
$235 USD
View
A
Retailer 5
-
£176 GBP
$235 USD
View
A
Retailer 6
-
£228 GBP
View
B+
Retailer 7
-
£242 GBP
$322 USD
View
A
Retailer 8
-
£321 GBP
View
A
Retailer 9
-
£330 GBP
€419 EUR
View
B+
Retailer 10
-
£339 GBP
$451 USD
View
B+
Retailer 11
-
£371 GBP
$494 USD
View
B
Retailer 12
-
£568 GBP
$757 USD
View
B
Retailer 13
-
£571 GBP
$760 USD
View
B
Retailer 14
-
£609 GBP
$811 USD
View
B
Retailer 15
-
£683 GBP
$910 USD
View
B
Retailer 16
-
£831 GBP
View
B
Retailer 17
-
£872 GBP
$1,161 USD
View
Most Expensive
B
Brilliant Earth
16229883A · Oct 29
£879 GBP
$1,170 USD
View
17 more retailers have this diamond
Prices start from £143 GBPSave up to £736 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
1.51ct Princess
£143 GBP