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Princess|Lab Grown|IGI

1.78ct G SI2 Princess Lab Grown Diamond

GD • G/SI2 • IGI LG494167484

Shape and cutting style on the report: Princess cut

Certificate IGI LG494167484

Diamond specifications and retailer prices

From £667 GBP
As of November 6, 2026
Save £232 GBP (26%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £899 GBP at The Diamond Guys · As of November 6, 2026
View at The Diamond Guys

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 G colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade and certified by IGI LG494167484 or 494167484. Listed at 10 retailers as of November 6, 2026, with prices from £667 to £899, a £232 spread on the same certified stone. The Diamond Guys lists it at £899. 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
G
Colour
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG494167484
Dimensions6.65 × 6.54 × 4.64 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
6.65 mm6.54 mm1.78 ctG / SI2
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG494167484
Side View
Table 72.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 70.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £732 GBP|Low: £160 GBP|High: £899 GBP|Avg: £613 GBP|-5.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
The Diamond Guys
November 4, 2026
Retailer 4£160 GBP
Retailer 6£340 GBP
Retailer 3£403 GBP
Retailer 2£640 GBP
Retailer 7£667 GBP
Retailer 1£732 GBP
Retailer 5£888 GBP
The Diamond Guys£899 GBP

17 data points across 8 retailers

10 retailers£667 GBP to £899 GBP

Retailer 1
-
£160 GBP
Price last confirmed 26 days ago
Retailer 2
-
£198 GBP
View
Price last confirmed 29 days ago
Retailer 3
-
£198 GBP
View
Price last confirmed 25 days ago
Retailer 4
-
£340 GBP
View
Price last confirmed 23 days ago
Retailer 5
-
£403 GBP
View
Price last confirmed 22 days ago
B
Retailer 6
-
£667 GBP
View
Retailer 7
-
£704 GBP
View
Price last confirmed 30 days ago
B
Retailer 8
-
£732 GBP
View
Retailer 9
-
£888 GBP
View
Price last confirmed 26 days ago
Most Expensive
B
The Diamond Guys
1980423639 · Nov 6
£899 GBP
$1,210 USD
View
9 more retailers have this diamond
Prices start from £667 GBPSave up to £232 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
£667 GBP