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Princess|Lab Grown|IGI

1.70ct E SI1 Princess Lab Grown Diamond

GD • E/SI1 • IGI LG528207701

Shape and cutting style on the report: Princess cut

Certificate IGI LG528207701

Diamond specifications and retailer prices

From £188 GBP
$251 USD
As of October 27, 2026
Save £923 GBP (83%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,111 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG528207701 or 528207701. Listed at 19 retailers as of October 27, 2026, with prices from £188 to £1,111, a £923 spread on the same certified stone. Brilliant Earth lists it at £1,111. 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

1.70
Carat
E
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG528207701
Dimensions6.44 × 6.41 × 4.47 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
6.44 mm6.41 mm1.70 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG528207701
Side View
Table 72.5%Crown 44.1°Girdle: Slightly ThickPavilion 37.3°Culet: NoneDepth 69.7%

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: Oct 27
Current: £1,111 GBP|Low: £181 GBP|High: £1,134 GBP|Avg: £513 GBP|-2.0%
Brilliant Earth
Retailer 2
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Retailer 19
October 29, 2026
Retailer 18£188 GBP
Retailer 9£211 GBP
Retailer 10£219 GBP
Retailer 6£234 GBP
Retailer 19£234 GBP
Retailer 14£301 GBP
Retailer 5£315 GBP
Retailer 15£353 GBP
Retailer 12£374 GBP
Retailer 4£430 GBP
Retailer 7£438 GBP
Retailer 2£444 GBP
Retailer 17£719 GBP
Retailer 3£752 GBP
Retailer 11£791 GBP
Retailer 16£841 GBP
Retailer 13£943 GBP
Retailer 8£1,019 GBP
Brilliant Earth£1,111 GBP

39 data points across 19 retailers

19 retailers£188 GBP to £1,111 GBP

A
Cheapest Retailer
-
£188 GBP
$251 USD
B+
Retailer 2
-
£211 GBP
$281 USD
View
Final sale: no returns
B+
Retailer 3
-
£219 GBP
$291 USD
View
B+
Retailer 4
-
£234 GBP
$312 USD
View
B+
Retailer 5
-
£234 GBP
$312 USD
View
B+
Retailer 6
-
£301 GBP
View
B+
Retailer 7
-
£315 GBP
$420 USD
View
B+
Retailer 8
-
£353 GBP
$470 USD
View
B+
Retailer 9
-
£374 GBP
€474 EUR
View
B+
Retailer 10
-
£430 GBP
$572 USD
View
B+
Retailer 11
-
£438 GBP
$583 USD
View
B+
Retailer 12
-
£444 GBP
View
B
Retailer 13
-
£719 GBP
$957 USD
View
B
Retailer 14
-
£752 GBP
$1,002 USD
View
B
Retailer 15
-
£791 GBP
$1,053 USD
View
B
Retailer 16
-
£841 GBP
$1,120 USD
View
Price last confirmed 11 days ago
B
Retailer 17
-
£943 GBP
View
B
Retailer 18
-
£1,019 GBP
$1,357 USD
View
Most Expensive
B
Brilliant Earth
16080965A · Oct 29
£1,111 GBP
$1,480 USD
View
18 more retailers have this diamond
Prices start from £188 GBPSave up to £923 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
£188 GBP