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Princess|Lab Grown|IGI

1.70ct D SI1 Princess Lab Grown Diamond

ID • D/SI1 • IGI LG789629098

Shape and cutting style on the report: Princess cut

Certificate IGI LG789629098

Diamond specifications and retailer prices

From £241 GBP
$323 USD
As of October 30, 2026
Save £990 GBP (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,231 GBP at Brilliant Earth · As of October 30, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG789629098 or 789629098. Listed at 17 retailers as of October 30, 2026, with prices from £241 to £1,231, a £990 spread on the same certified stone. Brilliant Earth lists it at £1,231. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.4°
Pavilion angle38.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG789629098
Dimensions6.55 × 6.48 × 4.62 mm
L/W Ratio1.01
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.55 mm6.48 mm1.70 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG789629098
Side View
Table 71.0%Crown 44.4°Girdle: MediumPavilion 38.5°Culet: NoneDepth 71.3%

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 30
Current: £1,231 GBP|Low: £231 GBP|High: £2,000 GBP|Avg: £634 GBP|-28.9%
Brilliant Earth
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 14£241 GBP
Retailer 16£269 GBP
Retailer 7£280 GBP
Retailer 5£299 GBP
Retailer 17£299 GBP
Retailer 2£334 GBP
Retailer 11£414 GBP
Retailer 6£481 GBP
Retailer 3£486 GBP
Retailer 8£497 GBP
Retailer 10£534 GBP
Retailer 13£877 GBP
Retailer 4£961 GBP
Retailer 9£995 GBP
Retailer 15£1,184 GBP
Retailer 12£1,205 GBP
Brilliant Earth£1,231 GBP

43 data points across 17 retailers

17 retailers£241 GBP to £1,231 GBP

A
Cheapest Retailer
-
£241 GBP
$323 USD
A
Retailer 2
-
£269 GBP
$361 USD
View
Final sale: no returns
A
Retailer 3
-
£280 GBP
$375 USD
View
A
Retailer 4
-
£299 GBP
$401 USD
View
A
Retailer 5
-
£299 GBP
$401 USD
View
A
Retailer 6
-
£334 GBP
View
A
Retailer 7
-
£414 GBP
$555 USD
View
B+
Retailer 8
-
£481 GBP
$645 USD
View
B+
Retailer 9
-
£486 GBP
$651 USD
View
B+
Retailer 10
-
£497 GBP
$666 USD
View
B+
Retailer 11
-
£534 GBP
View
B
Retailer 12
-
£877 GBP
$1,175 USD
View
B
Retailer 13
-
£961 GBP
$1,288 USD
View
B
Retailer 14
-
£995 GBP
$1,333 USD
View
B
Retailer 15
-
£1,184 GBP
$1,587 USD
View
B
Retailer 16
-
£1,205 GBP
View
Most Expensive
B
Brilliant Earth
18790708A · Oct 30
£1,231 GBP
$1,650 USD
View
16 more retailers have this diamond
Prices start from £241 GBPSave up to £990 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
£241 GBP