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Princess|Lab Grown|IGI

4.28ct D FL Princess Lab Grown Diamond

EX • D/FL • IGI LG813651576

Shape and cutting style on the report: Princess cut

Certificate IGI LG813651576

Diamond specifications and retailer prices

From £5,588 GBP
$7,487 USD
As of October 30, 2026
Save £16,019 GBP (74%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £21,607 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 4.28ct lab-grown princess diamond

This 4.28ct lab-grown princess sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG813651576 or 813651576. Listed at 19 retailers as of October 30, 2026, with prices from £5,588 to £21,607, a £16,019 spread on the same certified stone. Taylor and Hart lists it at £21,607. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.28
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.5°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG813651576
Dimensions8.95 × 8.70 × 6.29 mm
L/W Ratio1.03
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
8.95 mm8.70 mm4.28 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG813651576
Side View
Table 69.0%Crown 38.5°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 72.3%

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: £7,919 GBP|Low: £5,588 GBP|High: £25,477 GBP|Avg: £10,379 GBP|-19.2%
Retailer 1
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
Retailer 17
Taylor and Hart
October 31, 2026
Retailer 8£5,588 GBP
Retailer 5£5,803 GBP
Retailer 13£5,812 GBP
Retailer 15£5,957 GBP
Retailer 6£6,258 GBP
Retailer 12£6,441 GBP
Retailer 3£6,482 GBP
Retailer 9£7,289 GBP
Retailer 14£7,328 GBP
Retailer 16£7,507 GBP
Retailer 17£7,859 GBP
Retailer 1£7,919 GBP
Retailer 7£9,281 GBP
Retailer 10£10,278 GBP
Retailer 4£11,852 GBP
Retailer 11£12,795 GBP
Retailer 2£18,046 GBP
Taylor and Hart£21,607 GBP

38 data points across 18 retailers

19 retailers£5,588 GBP to £21,607 GBP

A
Cheapest Retailer
-
£5,588 GBP
$7,487 USD
A
Retailer 2
-
£5,803 GBP
$7,776 USD
View
A
Retailer 3
-
£5,812 GBP
$7,787 USD
View
A
Retailer 4
-
£5,957 GBP
$7,982 USD
View
A
Retailer 5
-
£6,258 GBP
$8,385 USD
View
Final sale: no returns
A
Retailer 6
-
£6,441 GBP
$8,630 USD
View
A
Retailer 7
-
£6,482 GBP
$8,685 USD
View
Retailer 8
-
£6,482 GBP
$8,685 USD
View
Price last confirmed 15 days ago
A
Retailer 9
-
£7,289 GBP
$9,767 USD
View
A
Retailer 10
-
£7,328 GBP
$9,819 USD
View
A
Retailer 11
-
£7,507 GBP
$10,058 USD
View
A
Retailer 12
-
£7,859 GBP
$10,530 USD
View
A
Retailer 13
-
£7,919 GBP
View
B+
Retailer 14
-
£9,281 GBP
View
B+
Retailer 15
-
£10,278 GBP
€13,116 EUR
View
B+
Retailer 16
-
£11,852 GBP
$15,881 USD
View
B+
Retailer 17
-
£12,795 GBP
View
B
Retailer 18
-
£18,046 GBP
$24,180 USD
View
Most Expensive
B
Taylor and Hart
UNPJEEV · Oct 31
£21,607 GBP
$28,951 USD
View
18 more retailers have this diamond
Prices start from £5,588 GBPSave up to £16,019 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
4.28ct Princess
£5,588 GBP