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Princess|Lab Grown|IGI

1.51ct D SI1 Princess Lab Grown Diamond

GD • D/SI1 • IGI LG510159147

Shape and cutting style on the report: Princess cut

Certificate IGI LG510159147

Diamond specifications and retailer prices

From £164 GBP
$220 USD
As of October 30, 2026
Save £672 GBP (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £836 GBP at Brilliant Earth · As of October 30, 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 D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG510159147 or 510159147. Listed at 19 retailers as of October 30, 2026, with prices from £164 to £836, a £672 spread on the same certified stone. Brilliant Earth lists it at £836. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.3°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG510159147
Dimensions6.29 × 6.09 × 4.42 mm
L/W Ratio1.03
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
6.29 mm6.09 mm1.51 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG510159147
Side View
Table 69.0%Crown 41.3°Girdle: Slightly ThickPavilion 38.3°Culet: NoneDepth 72.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £836 GBP|Low: £164 GBP|High: £963 GBP|Avg: £509 GBP|-13.2%
Brilliant Earth
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 5£164 GBP
Retailer 3£190 GBP
Retailer 7£193 GBP
Retailer 11£203 GBP
Retailer 12£203 GBP
Retailer 9£338 GBP
Retailer 10£348 GBP
Retailer 15£372 GBP
Retailer 2£374 GBP
Retailer 8£528 GBP
Retailer 14£653 GBP
Retailer 4£692 GBP
Retailer 6£769 GBP
Retailer 13£815 GBP
Brilliant Earth£836 GBP

41 data points across 15 retailers

19 retailers£164 GBP to £836 GBP

A
Cheapest Retailer
-
£164 GBP
$220 USD
Retailer 2
-
£172 GBP
$231 USD
View
Price last confirmed 39 days ago
A
Retailer 3
-
£190 GBP
$255 USD
View
B+
Retailer 4
-
£193 GBP
$259 USD
View
Final sale: no returns
Retailer 5
-
£200 GBP
$268 USD
View
Price last confirmed 38 days ago
B+
Retailer 6
-
£203 GBP
$272 USD
View
B+
Retailer 7
-
£203 GBP
$272 USD
View
Retailer 8
-
£211 GBP
$283 USD
View
Price last confirmed 36 days ago
B+
Retailer 9
-
£338 GBP
€431 EUR
View
B+
Retailer 10
-
£348 GBP
$466 USD
View
B+
Retailer 11
-
£372 GBP
$499 USD
View
B+
Retailer 12
-
£374 GBP
View
B
Retailer 13
-
£528 GBP
$707 USD
View
B
Retailer 14
-
£653 GBP
$875 USD
View
Retailer 15
-
£690 GBP
$924 USD
View
Price last confirmed 12 days ago
B
Retailer 16
-
£692 GBP
$928 USD
View
Retailer 17
-
£769 GBP
$1,030 USD
View
Price last confirmed 10 days ago
B
Retailer 18
-
£815 GBP
View
Most Expensive
B
Brilliant Earth
14251613A · Oct 30
£836 GBP
$1,120 USD
View
18 more retailers have this diamond
Prices start from £164 GBPSave up to £672 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
£164 GBP