Here are images of gold ores rich in sulfides including arsenopyrite.
Some of the ore types in these photos:
- https://en.wikipedia.org/wiki/Breccia
- https://en.wikipedia.org/wiki/Hornfels
- http://www.merriam-webster.com/dictionary/intrusion
- https://en.wikipedia.org/wiki/Limestone
- https://en.wikipedia.org/wiki/Volcanogenic_massive_sulfide_ore_deposit
- http://tinyurl.com/qcazwv8