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Princess|Lab Grown|IGI

1.51ct G VS1 Princess Lab Grown Diamond

ID • G/VS1 • IGI LG629441721

Shape and cutting style on the report: Princess cut

Certificate IGI LG629441721

Diamond specifications and retailer prices

From £178 GBP
As of November 4, 2026
Save £719 GBP (80%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,230 GBP at Brilliant Earth · As of October 22, 2026
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 G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG629441721 or 629441721. Listed at 20 retailers as of November 4, 2026, with a 404% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.7°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629441721
Dimensions6.20 × 6.18 × 4.50 mm
L/W Ratio1.00
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
6.20 mm6.18 mm1.51 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629441721
Side View
Table 70.0%Crown 43.7°Girdle: MED-STKPavilion 38.8°Culet: NoneDepth 72.8%

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: Nov 4
Current: £1,230 GBP|Low: £170 GBP|High: £1,230 GBP|Avg: £454 GBP
Brilliant Earth
Retailer 2
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Retailer 18
November 5, 2026
Retailer 18£178 GBP
Retailer 8£199 GBP
Retailer 9£206 GBP
Retailer 4£221 GBP
Retailer 7£221 GBP
Retailer 11£257 GBP
Retailer 17£296 GBP
Retailer 14£380 GBP
Retailer 15£398 GBP
Retailer 10£406 GBP
Retailer 2£413 GBP
Retailer 12£515 GBP
Retailer 16£565 GBP
Retailer 6£709 GBP
Retailer 3£741 GBP
Retailer 13£883 GBP
Retailer 5£896 GBP
Brilliant Earth£1,230 GBP

45 data points across 18 retailers

20 retailers£178 GBP to £896 GBP

A
Cheapest Retailer
-
£178 GBP
A
Retailer 2
-
£199 GBP
View
Final sale: no returns
A
Retailer 3
-
£206 GBP
View
A
Retailer 4
-
£221 GBP
View
Retailer 5
-
£221 GBP
View
Price last confirmed 11 days ago
A
Retailer 6
-
£257 GBP
View
B+
Retailer 7
-
£296 GBP
View
A
Retailer 8
-
£361 GBP
View
A
Retailer 9
-
£380 GBP
View
B+
Retailer 10
-
£398 GBP
View
B+
Retailer 11
-
£406 GBP
View
A
Retailer 12
-
£413 GBP
View
B+
Retailer 13
-
£515 GBP
View
B+
Retailer 14
-
£565 GBP
View
B
Retailer 15
-
£709 GBP
View
B
Retailer 16
-
£741 GBP
View
B
Retailer 17
-
£747 GBP
View
B
Retailer 18
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£883 GBP
View
B
Retailer 19
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£896 GBP
View
Most Expensive
Brilliant Earth
21312267A · Oct 22
£1,230 GBP
$1,660 USD
View
Price last confirmed 13 days ago
19 more retailers have this diamond
Prices start from £178 GBPSave up to £719 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
£178 GBP