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Princess|Lab Grown|IGI

1.27ct E SI1 Princess Lab Grown Diamond

ID • E/SI1 • IGI LG660405397

Shape and cutting style on the report: Princess cut

Certificate IGI LG660405397

Diamond specifications and retailer prices

From £131 GBP
$176 USD
As of October 30, 2026
Save £422 GBP (76%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £553 GBP at Friendly Diamonds · As of October 31, 2026
View at Friendly Diamonds

About this 1.27ct lab-grown princess diamond

This 1.27ct lab-grown princess sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG660405397 or 660405397. Listed at 12 retailers as of October 30, 2026, with prices from £131 to £553, a £422 spread on the same certified stone. Friendly Diamonds lists it at £553. 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

1.27
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.9°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG660405397
Dimensions5.82 × 5.79 × 4.23 mm
L/W Ratio1.01
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.82 mm5.79 mm1.27 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG660405397
Side View
Table 69.0%Crown 43.9°Girdle: STK-THKPavilion 39°Culet: NoneDepth 73.1%

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 30
Current: £553 GBP|Low: £131 GBP|High: £940 GBP|Avg: £381 GBP
Friendly Diamonds
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 31, 2026
Retailer 9£131 GBP
Retailer 3£152 GBP
Retailer 10£163 GBP
Retailer 14£182 GBP
Retailer 2£212 GBP
Retailer 4£263 GBP
Retailer 15£290 GBP
Retailer 8£292 GBP
Retailer 12£322 GBP
Retailer 11£350 GBP
Retailer 13£524 GBP
Retailer 6£546 GBP
Friendly Diamonds£553 GBP
Retailer 5£625 GBP
Retailer 7£940 GBP

5 data points across 15 retailers

12 retailers£131 GBP to £553 GBP

A
Cheapest Retailer
-
£131 GBP
$176 USD
A
Retailer 2
-
£152 GBP
$204 USD
View
A
Retailer 3
-
£163 GBP
$218 USD
View
A
Retailer 4
-
£182 GBP
HK$1,900 HKD
View
A
Retailer 5
-
£212 GBP
View
B+
Retailer 6
-
£290 GBP
$388 USD
View
B+
Retailer 7
-
£292 GBP
View
B+
Retailer 8
-
£322 GBP
$432 USD
View
B+
Retailer 9
-
£350 GBP
$469 USD
View
B
Retailer 10
-
£522 GBP
$700 USD
View
B
Retailer 11
-
£524 GBP
$702 USD
View
Most Expensive
B
Friendly Diamonds
6556775 · Oct 31
£553 GBP
$741 USD
View
11 more retailers have this diamond
Prices start from £131 GBPSave up to £422 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
1.27ct Princess
£131 GBP