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Princess|Lab Grown|IGI

1.70ct F SI1 Princess Lab Grown Diamond

ID • F/SI1 • IGI LG520208049

Shape and cutting style on the report: Princess cut

Certificate IGI LG520208049

Diamond specifications and retailer prices

From £331 GBP
$444 USD
As of November 1, 2026
Save £678 GBP (67%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,009 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 1.7ct lab-grown princess diamond

This 1.7ct 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 top-tier cut grade and certified by IGI LG520208049 or 520208049. Listed at 8 retailers as of October 31, 2026, with prices from £331 to £1,009, a £678 spread on the same certified stone. Taylor and Hart lists it at £1,009. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.70
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.9°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG520208049
Dimensions6.36 × 6.34 × 4.62 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
6.36 mm6.34 mm1.70 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG520208049
Side View
Table 67.0%Crown 41.9°Girdle: MED-STKPavilion 38.3°Culet: NoneDepth 72.9%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £350 GBP|Low: £124 GBP|High: £1,009 GBP|Avg: £573 GBP|+2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Taylor and Hart
November 3, 2026
Retailer 6£174 GBP
Retailer 5£331 GBP
Retailer 2£337 GBP
Retailer 1£350 GBP
Retailer 7£423 GBP
Retailer 8£681 GBP
Retailer 9£722 GBP
Retailer 3£773 GBP
Retailer 4£939 GBP
Taylor and Hart£1,009 GBP

37 data points across 10 retailers

8 retailers£331 GBP to £1,009 GBP

B+
Cheapest Retailer
-
£331 GBP
$444 USD
A
Retailer 2
-
£337 GBP
€431 EUR
View
A
Retailer 3
-
£350 GBP
View
B+
Retailer 4
-
£423 GBP
$567 USD
View
B
Retailer 5
-
£768 GBP
$1,030 USD
View
B
Retailer 6
-
£773 GBP
View
B
Retailer 7
-
£939 GBP
$1,260 USD
View
Most Expensive
B
Taylor and Hart
AI9YJEL · Oct 31
£1,009 GBP
$1,353 USD
View
7 more retailers have this diamond
Prices start from £331 GBPSave up to £678 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
1.70ct Princess
£331 GBP