CaratHunter
Plans
Princess|Lab Grown|IGI

1.51ct G SI2 Princess Lab Grown Diamond

ID • G/SI2 • IGI LG512220552

Shape and cutting style on the report: Princess cut

Certificate IGI LG512220552

Diamond specifications and retailer prices

From £728 GBP
As of November 4, 2026
Save £1,379 GBP (65%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,107 GBP at NZ Jewellers · As of November 6, 2026
View at NZ Jewellers

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 G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512220552 or 512220552. Listed at 10 retailers as of November 4, 2026, with prices from £728 to £2,107, a £1,379 spread on the same certified stone. NZ Jewellers lists it at £2,107. 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
G
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.9°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512220552
Dimensions6.46 × 6.27 × 4.24 mm
L/W Ratio1.03
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.46 mm6.27 mm1.51 ctG / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512220552
Side View
Table 69.5%Crown 42.9°Girdle: MediumPavilion 37.5°Culet: NoneDepth 67.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £2,107 GBP|Low: £728 GBP|High: £3,660 GBP|Avg: £1,649 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 4£728 GBP
Retailer 5£969 GBP
Retailer 8£1,054 GBP
Retailer 6£1,124 GBP
Retailer 2£1,560 GBP
Retailer 7£1,778 GBP
NZ Jewellers£2,107 GBP
Retailer 3£3,601 GBP

46 data points across 8 retailers

10 retailers£728 GBP to £2,107 GBP

B+
Cheapest Retailer
-
£728 GBP
B
Retailer 2
-
£969 GBP
View
B
Retailer 3
-
£1,054 GBP
View
Retailer 4
-
£1,124 GBP
View
Price last confirmed 25 days ago
B
Retailer 5
-
£1,124 GBP
View
B
Retailer 6
-
£1,560 GBP
View
B
Retailer 7
-
£1,778 GBP
View
B
Retailer 8
-
£2,095 GBP
View
Most Expensive
B
NZ Jewellers
b72a46bb-8494-4d8e-9646-6011191bf4b4 · Nov 6
£2,107 GBP
$2,836 USD
View
8 more retailers have this diamond
Prices start from £728 GBPSave up to £1,379 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.

B+
1.51ct Princess
£728 GBP