CaratHunter
Plans
Princess|Lab Grown|IGI

1.51ct F SI1 Princess Lab Grown Diamond

ID • F/SI1 • IGI LG727512311

Shape and cutting style on the report: Princess cut

Certificate IGI LG727512311

Diamond specifications and retailer prices

From £949 GBP
$1,270 USD
As of November 6, 2026
1 retailer carries this diamond
Only listing: £949 GBP at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG727512311 or 727512311. Listed at a single retailer as of November 6, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.3°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG727512311
Dimensions6.29 × 6.09 × 4.26 mm
L/W Ratio1.03
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.29 mm6.09 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG727512311
Side View
Table 71.0%Crown 47.3°Girdle: MED-STKPavilion 36.7°Culet: NoneDepth 70.0%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £949 GBP|Low: £127 GBP|High: £1,076 GBP|Avg: £510 GBP|-11.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
April 14, 2026
Retailer 5£165 GBP
Retailer 3£176 GBP
Retailer 11£191 GBP
Retailer 6£303 GBP
Retailer 12£394 GBP
Retailer 9£403 GBP
Retailer 2£494 GBP
Retailer 10£564 GBP
Retailer 7£607 GBP
Retailer 4£681 GBP
Retailer 8£720 GBP
Brilliant Earth£949 GBP

49 data points across 12 retailers

1 retailer

B
Brilliant Earth
15636184A · Nov 6
£949 GBP
$1,270 USD
View

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.

B
1.51ct Princess
£949 GBP