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Round|Lab Grown|IGI

1.66ct H SI1 Round Lab Grown Diamond

ID • H/SI1

Diamond specifications and retailer prices

From €546 EUR
$612 USD
As of November 2, 2026
Save €729 EUR (57%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €1,274 EUR at Diamond Exchange Canada · As of November 2, 2026
View at Diamond Exchange Canada

About this 1.66ct lab-grown round diamond

This 1.66ct lab-grown round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI. Listed at 2 retailers as of November 2, 2026, with prices from €546 to €1,274, a €729 spread on the same certified stone. Diamond Exchange Canada lists it at €1,274. 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

1.66
Carat
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions7.59 × 7.62 × 4.70 mm
L/W Ratio1.00
Top View
7.59 mm7.62 mm1.66 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 57.5%CrownGirdle: MediumPavilionCulet: NoneDepth

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: Nov 2
Current: €1,274 EUR|Low: €546 EUR|High: €1,274 EUR|Avg: €910 EUR
Diamond Exchange Canada
Retailer 2
October 17, 2026
Retailer 2€546 EUR
Diamond Exchange Canada€1,274 EUR

2 data points across 2 retailers

2 retailers€546 EUR to €1,274 EUR

A
Cheapest Retailer
-
€546 EUR
$612 USD
Most Expensive
B+
Diamond Exchange Canada
1960631757 · Nov 2
€1,274 EUR
CA$1,985 CAD
View
1 more retailer has this diamond
Prices start from €546 EURSave up to €729 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
1.66ct Round
€546 EUR