![Quartz-tourmaline pegmatitic orbicules included in leucogranites from... | Download Scientific Diagram Quartz-tourmaline pegmatitic orbicules included in leucogranites from... | Download Scientific Diagram](https://www.researchgate.net/publication/341217650/figure/fig1/AS:960055230861316@1605906412460/Quartz-tourmaline-pegmatitic-orbicules-included-in-leucogranites-from-Seagull-batholith.jpg)
Quartz-tourmaline pegmatitic orbicules included in leucogranites from... | Download Scientific Diagram
![Found in North bay Ontario, Canada on a hill known for granite. found these black formations coming out of quartz and granite stones that have been exposed. Is it coal, black tourmaline, Found in North bay Ontario, Canada on a hill known for granite. found these black formations coming out of quartz and granite stones that have been exposed. Is it coal, black tourmaline,](https://preview.redd.it/found-in-north-bay-ontario-canada-on-a-hill-known-for-v0-vywvo3urqyx91.jpg?width=640&crop=smart&auto=webp&s=861e7db84c9c6d09c09ed66064c082c8d29a9309)
Found in North bay Ontario, Canada on a hill known for granite. found these black formations coming out of quartz and granite stones that have been exposed. Is it coal, black tourmaline,
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