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Princess|Lab Grown|IGI

1.71ct F SI1 Princess Lab Grown Diamond

ID • F/SI1 • IGI LG657423845

Shape and cutting style on the report: Princess cut

Certificate IGI LG657423845

Diamond specifications and retailer prices

From $192 USD
As of November 2, 2026
Save $1,078 USD (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,270 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.71ct lab-grown princess diamond

This 1.71ct 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 LG657423845 or 657423845. Listed at 15 retailers as of October 31, 2026, with prices from $192 to $1,270, a $1,078 spread on the same certified stone. Brilliant Earth lists it at $1,270. 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

1.71
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.5°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG657423845
Dimensions6.71 × 6.46 × 4.27 mm
L/W Ratio1.04
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.71 mm6.46 mm1.71 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG657423845
Side View
Table 76.0%Crown 44.5°Girdle: Slightly ThickPavilion 35.9°Culet: NoneDepth 66.1%

Caratlytics Score

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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 2
Current: $1,270 USD|Low: $192 USD|High: $2,020 USD|Avg: $692 USD|-37.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9$192 USD
Retailer 2$306 USD
Retailer 10$417 USD
Retailer 4$431 USD
Retailer 6$446 USD
Retailer 3$504 USD
Retailer 11$567 USD
Retailer 8$770 USD
Retailer 7$1,010 USD
Retailer 5$1,116 USD
Brilliant Earth$1,270 USD

44 data points across 11 retailers

15 retailers$192 USD to $1,270 USD

A
Cheapest Retailer
-
$192 USD
A
Retailer 2
-
$223 USD
View
A
Retailer 3
-
$239 USD
View
Retailer 4
-
$239 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$306 USD
£241 GBP
View
B+
Retailer 6
-
$417 USD
View
A
Retailer 7
-
$431 USD
£340 GBP
View
A
Retailer 8
-
$446 USD
€425 EUR
View
A
Retailer 9
-
$504 USD
View
B+
Retailer 10
-
$567 USD
View
B+
Retailer 11
-
$767 USD
View
B
Retailer 12
-
$770 USD
View
B
Retailer 13
-
$1,010 USD
View
B
Retailer 14
-
$1,116 USD
£879 GBP
View
Most Expensive
B
Brilliant Earth
13299720A · Oct 31
$1,270 USD
View
14 more retailers have this diamond
Prices start from $192 USDSave up to $1,078 USD

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
1.71ct Princess
$192 USD