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Round|Lab Grown|IGI

1.71ct F SI1 Round Lab Grown Diamond

ID • F/SI1

Diamond specifications and retailer prices

From €458 EUR
£404 GBP
As of October 29, 2026
Save €454 EUR (50%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €912 EUR at Blue Nile · As of October 29, 2026
View at Blue Nile

About this 1.71ct lab-grown round diamond

This 1.71ct lab-grown round 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 €458 to €912, a €454 spread on the same certified stone. Blue Nile lists it at €912. 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
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions7.65 × 7.67 × 0.00 mm
L/W Ratio1.00
Top View
7.65 mm7.67 mm1.71 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 61.6%

Caratlytics Score

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

Last verified: Oct 29
Current: €912 EUR|Low: €176 EUR|High: €912 EUR|Avg: €506 EUR
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 3€176 EUR
Retailer 5€212 EUR
Retailer 2€458 EUR
Retailer 4€806 EUR
Blue Nile€912 EUR

34 data points across 5 retailers

2 retailers€458 EUR to €912 EUR

A
Cheapest Retailer
-
€458 EUR
£404 GBP
Most Expensive
B
Blue Nile
20300310 · Oct 29
€912 EUR
$1,023 USD
View
1 more retailer has this diamond
Prices start from €458 EURSave up to €454 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 Round
€458 EUR