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Princess|Lab Grown|IGI

3.51ct D IF Princess Lab Grown Diamond

ID • D/IF • IGI LG754594391

Shape and cutting style on the report: Princess cut

Certificate IGI LG754594391

Diamond specifications and retailer prices

From £1,990 GBP
$2,666 USD
As of October 30, 2026
Save £11,698 GBP (85%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £14,456 GBP at Novita Diamonds · As of October 8, 2026
View at Novita Diamonds

About this 3.51ct lab-grown princess diamond

This 3.51ct lab-grown princess sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754594391 or 754594391. Listed at 17 retailers as of October 30, 2026, with a 588% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.51
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.5°
Pavilion angle36.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594391
Dimensions8.40 × 8.40 × 8.15 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
8.40 mm8.40 mm3.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594391
Side View
Table 64.0%Crown 43.5°Girdle: MediumPavilion 36.6°Culet: NoneDepth 71.9%

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: £14,456 GBP|Low: £1,990 GBP|High: £27,816 GBP|Avg: £7,087 GBP|-2.1%
Novita Diamonds
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
October 30, 2026
Retailer 12£1,990 GBP
Retailer 2£2,267 GBP
Retailer 13£2,403 GBP
Retailer 14£2,526 GBP
Retailer 6£2,708 GBP
Retailer 3£3,183 GBP
Retailer 5£3,983 GBP
Retailer 15£4,148 GBP
Retailer 4£4,482 GBP
Retailer 9£4,560 GBP
Retailer 8£4,851 GBP
Retailer 17£6,272 GBP
Retailer 16£6,492 GBP
Retailer 7£7,461 GBP
Retailer 10£7,993 GBP
Retailer 11£13,688 GBP
Novita Diamonds£14,456 GBP

32 data points across 17 retailers

17 retailers£1,990 GBP to £13,688 GBP

A
Cheapest Retailer
-
£1,990 GBP
$2,666 USD
A
Retailer 2
-
£2,267 GBP
$3,038 USD
View
A
Retailer 3
-
£2,403 GBP
$3,220 USD
View
A
Retailer 4
-
£2,526 GBP
$3,385 USD
View
A
Retailer 5
-
£2,708 GBP
$3,629 USD
View
A
Retailer 6
-
£3,183 GBP
$4,265 USD
View
A
Retailer 7
-
£3,983 GBP
$5,337 USD
View
A
Retailer 8
-
£4,148 GBP
€5,293 EUR
View
B+
Retailer 9
-
£4,482 GBP
$6,006 USD
View
B+
Retailer 10
-
£4,560 GBP
$6,110 USD
View
Final sale: no returns
Retailer 11
-
£4,851 GBP
$6,500 USD
View
Price last confirmed 13 days ago
B+
Retailer 12
-
£6,272 GBP
$8,404 USD
View
B+
Retailer 13
-
£6,492 GBP
View
Retailer 14
-
£7,461 GBP
A$15,380 AUD
View
Price last confirmed 8 days ago
B+
Retailer 15
-
£7,993 GBP
$10,710 USD
View
B
Retailer 16
-
£13,688 GBP
$18,340 USD
View
Most Expensive
Novita Diamonds
cert_754594391 · Oct 8
£14,456 GBP
A$29,799 AUD
View
Price last confirmed 22 days ago
16 more retailers have this diamond
Prices start from £1,990 GBPSave up to £11,698 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
3.51ct Princess
£1,990 GBP