Where to Find Calcite in Ontario: 4 Mapped Sites
Ontario has 4 documented sites where calcite have been reported, and the best-known are Hoyle Pond Mine, Temiskaming Silver-Cobalt Deposits - Canada, and Fission. Every site is mapped below with GPS coordinates and links to a full report of access and what's been found there.
Last updated: — data compiled by the Rockhounding.org Research Team · methodology
Calcite Map: Ontario
All 4 calcite sites in Ontario. Click a pin for the full site report.
Where Calcite Are Found in Ontario
Calcite fills cavities and veins in limestone country and rides along in ore veins nearly everywhere. Quarries, roadcuts in limestone, and mine dumps all produce it.
The richest reported sites in Ontario: Hoyle Pond Mine, Temiskaming Silver-Cobalt Deposits - Canada, Fission, Marmora.
All Calcite Sites in Ontario
- Hoyle Pond Mine — Other
- Temiskaming Silver-Cobalt Deposits - Canada — Other
- Fission — Other
- Marmora — Other
How to Identify Calcite
Calcite is the fizz test mineral: a drop of vinegar bubbles on it. Hardness 3 — a knife or even a copper coin scratches it — and it cleaves into perfect rhombohedra, so broken pieces are little slanted boxes. Crystals range from dogtooth points to flat plates in nearly any color, and many localities fluoresce red or orange under UV light.
Not sure what you found? Try our identification guide →Frequently Asked Questions
Where can I find calcite in Ontario?
Ontario has 4 mapped sites where calcite have been reported. The best-known are Hoyle Pond Mine, Temiskaming Silver-Cobalt Deposits - Canada, and Fission. Each listing on the map above includes GPS coordinates, access type, and what has been found there.
How many calcite sites are mapped in Ontario?
We have 4 documented calcite sites in Ontario, compiled from provincial geological survey records and community submissions, reviewed by the Rockhounding.org Research Team.
Is it legal to collect calcite in Ontario?
Ontario permits hobby collecting with hand tools for personal use. It is prohibited in provincial and national parks and on staked claims or withdrawn land. Always verify land status before you dig.
How do I identify calcite?
Calcite is the fizz test mineral: a drop of vinegar bubbles on it. Hardness 3 — a knife or even a copper coin scratches it — and it cleaves into perfect rhombohedra, so broken pieces are little slanted boxes. Crystals range from dogtooth points to flat plates in nearly any color, and many localities fluoresce red or orange under UV light.
⚠️ Always verify current regulations, weather conditions, and access requirements before visiting any location. Information provided is based on community submissions and may not be current or accurate.
More to Find in Ontario
Calcite in Nearby Provinces
Data: USGS Mineral Resources Data System — reviewed and approved by the Rockhounding.org Research Team. Always verify current land status, regulations, and access before visiting any site.