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Princess|Lab Grown|IGI

1.51ct E IF Princess Lab Grown Diamond

EX • E/IF • IGI LG720540148

Shape and cutting style on the report: Princess cut

Certificate IGI LG720540148

Diamond specifications and retailer prices

From £463 GBP
$621 USD
As of October 30, 2026
Save £1,820 GBP (80%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £2,284 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG720540148 or 720540148. Listed at 25 retailers as of October 30, 2026, with prices from £463 to £2,284, a £1,820 spread on the same certified stone. Brilliant Earth lists it at £2,284. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.6°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG720540148
Dimensions6.22 × 6.16 × 4.46 mm
L/W Ratio1.01
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
6.22 mm6.16 mm1.51 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG720540148
Side View
Table 71.0%Crown 47.6°Girdle: Slightly ThickPavilion 37.6°Culet: NoneDepth 72.4%

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: Oct 30
Current: £2,284 GBP|Low: £518 GBP|High: £2,381 GBP|Avg: £1,186 GBP|-4.1%
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
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Retailer 16
October 30, 2026
Retailer 15£518 GBP
Retailer 6£519 GBP
Retailer 16£575 GBP
Retailer 12£668 GBP
Retailer 5£729 GBP
Retailer 8£770 GBP
Retailer 2£900 GBP
Retailer 9£962 GBP
Retailer 11£987 GBP
Retailer 14£1,249 GBP
Retailer 13£1,549 GBP
Retailer 7£1,672 GBP
Retailer 4£1,814 GBP
Retailer 3£1,833 GBP
Retailer 10£2,276 GBP
Brilliant Earth£2,284 GBP

43 data points across 16 retailers

25 retailers£463 GBP to £2,284 GBP

A
Cheapest Retailer
-
£463 GBP
$621 USD
A
Retailer 2
-
£518 GBP
$694 USD
View
Final sale: no returns
A
Retailer 3
-
£519 GBP
$695 USD
View
A
Retailer 4
-
£575 GBP
$770 USD
View
Retailer 5
-
£575 GBP
$770 USD
View
Price last confirmed 14 days ago
A
Retailer 6
-
£630 GBP
HK$6,600 HKD
View
A
Retailer 7
-
£668 GBP
$895 USD
View
A
Retailer 8
-
£729 GBP
$977 USD
View
A
Retailer 9
-
£770 GBP
$1,032 USD
View
A
Retailer 10
-
£841 GBP
$1,127 USD
View
A
Retailer 11
-
£900 GBP
View
A
Retailer 12
-
£962 GBP
€1,228 EUR
View
A
Retailer 13
-
£987 GBP
ZAR 21,366 ZAR
View
B+
Retailer 14
-
£1,249 GBP
$1,673 USD
View
B+
Retailer 15
-
£1,511 GBP
$2,024 USD
View
Retailer 16
-
£1,549 GBP
$2,075 USD
View
Price last confirmed 12 days ago
B+
Retailer 17
-
£1,672 GBP
View
B+
Retailer 18
-
£1,814 GBP
SGD 3,285 SGD
View
B+
Retailer 19
-
£1,833 GBP
$2,456 USD
View
B+
Retailer 20
-
£1,855 GBP
$2,486 USD
View
B+
Retailer 21
-
£1,893 GBP
$2,536 USD
View
B+
Retailer 22
-
£1,904 GBP
$2,551 USD
View
B
Retailer 23
-
£2,076 GBP
View
B
Retailer 24
-
£2,276 GBP
View
Most Expensive
B
Brilliant Earth
15503724A · Oct 30
£2,284 GBP
$3,060 USD
View
24 more retailers have this diamond
Prices start from £463 GBPSave up to £1,820 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
£463 GBP