Greenstone Island is a Island located in Timiskaming, Ontario and has an elevation of 323 meters.

• Latitude: 47° 23' 53'' North   (decimal: 47.3980555)
• Longitude: 79° 42' 8'' West   (decimal: -79.7022222)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 323 meters
• Location: Timiskaming
• Atlas of Canada Locator Map: Greenstone Island
• GPS Coordinate Locator Map: Greenstone Island Lat/Long