Black Widow and Hawkeye argued over which one of the two would help Captain America, until Falcon appeared with the orders for the two to hold off the Super-Adaptoid while he called Iron Man, to which Black Widow ordered him not to.
Chicken's blood stone is a rock, rather than a mineral, that is composed of dickite; a polymorph of kaolinite, and quartz. It also has a variable amount of cinnabar, which gives it a distinctive vivid red color.
A Blood Shard. Blood Shards are an alternate currency in the Adventure Mode of Diablo III: Reaper of Souls. They drop from Horadric Caches and Rift Guardians. They can only be used to buy items from Kadala, through gambling. They can be picked up by simply walking over them, just like gold.