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Princess|Lab Grown|IGI

1.78ct F SI1 Princess Lab Grown Diamond

GD • F/SI1 • IGI LG528235175

Shape and cutting style on the report: Princess cut

Certificate IGI LG528235175

Diamond specifications and retailer prices

From £372 GBP
$499 USD
As of November 1, 2026
Save £1,603 GBP (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,975 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.78ct lab-grown princess diamond

This 1.78ct lab-grown princess sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG528235175 or 528235175. Listed at 13 retailers as of November 1, 2026, with prices from £372 to £1,975, a £1,603 spread on the same certified stone. Do Amore Diamonds lists it at £1,975. 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

1.78
Carat
F
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.5°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG528235175
Dimensions6.75 × 6.60 × 4.71 mm
L/W Ratio1.02
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.75 mm6.60 mm1.78 ctF / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG528235175
Side View
Table 69.5%Crown 40.5°Girdle: MediumPavilion 39.1°Culet: NoneDepth 71.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £1,975 GBP|Low: £349 GBP|High: £1,975 GBP|Avg: £742 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 8£372 GBP
Retailer 6£373 GBP
Retailer 4£447 GBP
Retailer 10£452 GBP
Retailer 2£545 GBP
Retailer 12£714 GBP
Retailer 9£749 GBP
Retailer 7£848 GBP
Retailer 3£998 GBP
Retailer 11£1,100 GBP
Retailer 5£1,221 GBP
Do Amore Diamonds£1,975 GBP

36 data points across 12 retailers

13 retailers£372 GBP to £1,975 GBP

Retailer 1
-
£175 GBP
$235 USD
Price last confirmed 41 days ago
Retailer 2
-
£214 GBP
$287 USD
View
Price last confirmed 40 days ago
B+
Retailer 3
-
£372 GBP
$499 USD
View
B+
Retailer 4
-
£373 GBP
$500 USD
View
B+
Retailer 5
-
£452 GBP
$606 USD
View
B
Retailer 6
-
£545 GBP
View
B
Retailer 7
-
£714 GBP
$958 USD
View
B
Retailer 8
-
£749 GBP
$1,005 USD
View
B
Retailer 9
-
£848 GBP
$1,138 USD
View
B
Retailer 10
-
£998 GBP
$1,339 USD
View
B
Retailer 11
-
£1,100 GBP
$1,476 USD
View
C
Retailer 12
-
£1,221 GBP
View
Most Expensive
C
Do Amore Diamonds
27-0988B7928 · Nov 2
£1,975 GBP
$2,650 USD
View
12 more retailers have this diamond
Prices start from £372 GBPSave up to £1,603 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.

B+
1.78ct Princess
£372 GBP