Princess|Lab Grown|IGI

1.28ct E FL Princess Lab Grown Diamond

ID • E/FL • IGI LG764613089

Shape and cutting style on the report: Princess cut

Certificate IGI LG764613089

Diamond specifications and retailer prices

From £346 GBP
$463 USD
As of October 30, 2026
Save £1,684 GBP (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £2,030 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.28ct lab-grown princess diamond

This 1.28ct lab-grown princess sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG764613089 or 764613089. Listed at 18 retailers as of October 29, 2026, with prices from £346 to £2,030, a £1,684 spread on the same certified stone. Brilliant Earth lists it at £2,030. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.8°
Pavilion angle38.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG764613089
Dimensions5.96 × 5.95 × 4.15 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
5.96 mm5.95 mm1.28 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG764613089
Side View
Table 67.0%Crown 42.8°Girdle: MediumPavilion 38.6°Culet: NoneDepth 69.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £2,030 GBP|Low: £331 GBP|High: £2,271 GBP|Avg: £882 GBP|-2.5%
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
Retailer 16
October 30, 2026
Retailer 14£346 GBP
Retailer 7£387 GBP
Retailer 3£428 GBP
Retailer 15£428 GBP
Retailer 12£534 GBP
Retailer 5£654 GBP
Retailer 9£656 GBP
Retailer 16£669 GBP
Retailer 6£703 GBP
Retailer 2£708 GBP
Retailer 11£736 GBP
Retailer 13£1,151 GBP
Retailer 4£1,359 GBP
Retailer 8£1,399 GBP
Retailer 10£1,582 GBP
Brilliant Earth£2,030 GBP

44 data points across 16 retailers

18 retailers£346 GBP to £2,030 GBP

A
Cheapest Retailer
-
£346 GBP
$463 USD
A
Retailer 2
-
£387 GBP
$518 USD
View
Final sale: no returns
A
Retailer 3
-
£387 GBP
$518 USD
View
Retailer 4
-
£428 GBP
$574 USD
View
Price last confirmed 14 days ago
A
Retailer 5
-
£428 GBP
$574 USD
View
A
Retailer 6
-
£534 GBP
$715 USD
View
A
Retailer 7
-
£654 GBP
$876 USD
View
A
Retailer 8
-
£656 GBP
€837 EUR
View
A
Retailer 9
-
£669 GBP
$897 USD
View
A
Retailer 10
-
£703 GBP
$942 USD
View
A
Retailer 11
-
£708 GBP
View
A
Retailer 12
-
£736 GBP
ZAR 15,930 ZAR
View
B+
Retailer 13
-
£1,151 GBP
$1,542 USD
View
B+
Retailer 14
-
£1,359 GBP
SGD 2,460 SGD
View
B+
Retailer 15
-
£1,377 GBP
$1,845 USD
View
B+
Retailer 16
-
£1,399 GBP
$1,875 USD
View
B+
Retailer 17
-
£1,582 GBP
View
Most Expensive
B
Brilliant Earth
18702167A · Oct 29
£2,030 GBP
$2,720 USD
View
17 more retailers have this diamond
Prices start from £346 GBPSave up to £1,684 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
1.28ct Princess
£346 GBP