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Princess|Lab Grown|IGI

1.71ct E SI1 Princess Lab Grown Diamond

ID • E/SI1 • IGI LG514290249

Shape and cutting style on the report: Princess cut

Certificate IGI LG514290249

Diamond specifications and retailer prices

From £164 GBP
$219 USD
As of October 27, 2026
Save £857 GBP (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,021 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.71ct lab-grown princess diamond

This 1.71ct 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 LG514290249 or 514290249. Listed at 18 retailers as of October 27, 2026, with prices from £164 to £1,021, a £857 spread on the same certified stone. Brilliant Earth lists it at £1,021. 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

1.71
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.4°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG514290249
Dimensions6.61 × 6.45 × 4.55 mm
L/W Ratio1.02
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.61 mm6.45 mm1.71 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG514290249
Side View
Table 66.5%Crown 44.4°Girdle: MediumPavilion 37.3°Culet: NoneDepth 70.5%

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 27
Current: £1,021 GBP|Low: £164 GBP|High: £1,029 GBP|Avg: £487 GBP|-0.7%
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 11
Retailer 12
Retailer 13
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Retailer 18
October 29, 2026
Retailer 5£164 GBP
Retailer 3£184 GBP
Retailer 18£191 GBP
Retailer 12£204 GBP
Retailer 10£233 GBP
Retailer 13£263 GBP
Retailer 16£276 GBP
Retailer 7£345 GBP
Retailer 2£379 GBP
Retailer 14£400 GBP
Retailer 11£419 GBP
Retailer 17£425 GBP
Retailer 9£584 GBP
Retailer 15£656 GBP
Retailer 4£695 GBP
Retailer 8£841 GBP
Retailer 6£935 GBP
Brilliant Earth£1,021 GBP

35 data points across 18 retailers

18 retailers£164 GBP to £1,021 GBP

A
Cheapest Retailer
-
£164 GBP
$219 USD
A
Retailer 2
-
£184 GBP
$245 USD
View
Final sale: no returns
A
Retailer 3
-
£191 GBP
$254 USD
View
A
Retailer 4
-
£204 GBP
$272 USD
View
A
Retailer 5
-
£233 GBP
$310 USD
View
A
Retailer 6
-
£263 GBP
View
B+
Retailer 7
-
£276 GBP
$368 USD
View
A
Retailer 8
-
£345 GBP
$460 USD
View
A
Retailer 9
-
£379 GBP
View
A
Retailer 10
-
£400 GBP
$533 USD
View
B+
Retailer 11
-
£419 GBP
€532 EUR
View
B+
Retailer 12
-
£425 GBP
$566 USD
View
B
Retailer 13
-
£584 GBP
$778 USD
View
B+
Retailer 14
-
£656 GBP
$873 USD
View
B
Retailer 15
-
£695 GBP
$926 USD
View
B
Retailer 16
-
£841 GBP
$1,120 USD
View
Price last confirmed 11 days ago
B
Retailer 17
-
£935 GBP
View
Most Expensive
B
Brilliant Earth
11260603A · Oct 29
£1,021 GBP
$1,360 USD
View
17 more retailers have this diamond
Prices start from £164 GBPSave up to £857 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
1.71ct Princess
£164 GBP