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Radiant|Lab Grown|IGI

1.71ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1

Diamond specifications and retailer prices

From €286 EUR
£253 GBP
As of October 29, 2026
Save €643 EUR (69%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €929 EUR at Blue Nile · As of October 29, 2026
View at Blue Nile

About this 1.71ct lab-grown radiant diamond

This 1.71ct lab-grown radiant 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. Listed at 2 retailers as of October 29, 2026, with prices from €286 to €929, a €643 spread on the same certified stone. Blue Nile lists it at €929. 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
OriginLab Grown
Grading LabIGI
Dimensions8.50 × 5.87 × 3.95 mm
L/W Ratio1.45
Top View
8.50 mm5.87 mm1.71 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 64.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 67.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: €929 EUR|Low: €169 EUR|High: €929 EUR|Avg: €468 EUR
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 4€169 EUR
Retailer 5€195 EUR
Retailer 2€286 EUR
Retailer 3€742 EUR
Blue Nile€929 EUR

18 data points across 5 retailers

2 retailers€286 EUR to €929 EUR

A
Cheapest Retailer
-
€286 EUR
£253 GBP
Most Expensive
B
Blue Nile
20299611 · Oct 29
€929 EUR
$1,042 USD
View
1 more retailer has this diamond
Prices start from €286 EURSave up to €643 EUR

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 Radiant
€286 EUR