Genoa

The Genoa quarry, in Clay Township, Ottawa County, Ohio, is an active industrial dolomite quarry working the Lockport Dolomite formation — currently operated by Graymont Dolime (OH) Inc., after passing through US Gypsum and GenLime Group ownership. Ottawa County's dolomite quarries, including this one, are regionally known among collectors for fluorescent celestite, calcite, dolomite, and fluorite crystals alongside pyrite, marcasite, and fossils — but that reputation comes from a mix of quarries in the area, and no source found confirms any public or club access arrangement at the Genoa quarry specifically. As an active commercial operation, assume it's closed to collectors unless you find a specific, current program that says otherwise.

Genoa is in Clay Township, Ottawa County, Ohio, along the Lake Erie shore corridor southeast of Toledo. No public entrance or visitor access point was found — this is an active industrial site.

Not applicable under current ownership — no confirmed public or club access path.

This is an active commercial dolomite/limestone quarry operated by Graymont Dolime (OH) Inc. No source found documents a mineral-club field-trip program or any other public access arrangement here, unlike some other active quarries regionally (e.g. Hunting Hill Quarry, MD, which has a documented club program). Treat it as closed; contact the operator directly if you want to pursue a formal access request.