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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 $514 USD
£404 GBP
As of October 29, 2026
Save $509 USD (50%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,023 USD 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 $514 to $1,023, a $509 spread on the same certified stone. Blue Nile lists it at $1,023. 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
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: $1,023 USD|Low: $197 USD|High: $1,023 USD|Avg: $566 USD
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 3$197 USD
Retailer 5$238 USD
Retailer 2$514 USD
Retailer 4$904 USD
Blue Nile$1,023 USD

35 data points across 5 retailers

2 retailers$514 USD to $1,023 USD

A
Cheapest Retailer
-
$514 USD
£404 GBP
Most Expensive
B
Blue Nile
20300310 · Oct 29
$1,023 USD
View
1 more retailer has this diamond
Prices start from $514 USDSave up to $509 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 Round
$514 USD