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Princess|Lab Grown|IGI

1.51ct I SI1 Princess Lab Grown Diamond

ID • I/SI1 • IGI LG447001296

Shape and cutting style on the report: Princess cut

Certificate IGI LG447001296

Diamond specifications and retailer prices

From £646 GBP
As of November 4, 2026
Save £2,966 GBP (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,612 GBP at MOH London · As of November 3, 2026
View at MOH London

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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG447001296 or 447001296. Listed at 10 retailers as of November 3, 2026, with prices from £646 to £3,612, a £2,966 spread on the same certified stone. MOH London lists it at £3,612. 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle50.6°
Pavilion angle36.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG447001296
Dimensions6.42 × 6.15 × 4.22 mm
L/W Ratio1.04
Culet sizePointed
Cert comments
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Top View
6.42 mm6.15 mm1.51 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG447001296
Side View
Table 73.0%Crown 50.6°Girdle: Slightly ThickPavilion 36.6°Culet: NoneDepth 68.6%

Caratlytics Score

How it works →
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: Nov 4
Current: £3,612 GBP|Low: £646 GBP|High: £3,655 GBP|Avg: £1,799 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 2£646 GBP
Retailer 3£969 GBP
Retailer 5£1,252 GBP
Retailer 7£1,548 GBP
Retailer 4£1,778 GBP
Retailer 6£2,095 GBP
MOH London£3,612 GBP

11 data points across 7 retailers

10 retailers£646 GBP to £3,612 GBP

A
Cheapest Retailer
-
£646 GBP
B+
Retailer 2
-
£969 GBP
View
B+
Retailer 3
-
£1,054 GBP
View
B
Retailer 4
-
£1,124 GBP
View
Retailer 5
-
£1,124 GBP
View
Price last confirmed 25 days ago
B+
Retailer 6
-
£1,252 GBP
View
B
Retailer 7
-
£1,778 GBP
View
B
Retailer 8
-
£2,095 GBP
View
B
Retailer 9
-
£2,107 GBP
View
Most Expensive
B
MOH London
LG447001296 · Nov 3
£3,612 GBP
View
9 more retailers have this diamond
Prices start from £646 GBPSave up to £2,966 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
£646 GBP