You have a nice piece of vein quartz, the fine textured, creamy type that tends to be some of the best for knapping, although it all depends on how the material is laid out inside. Looks like that piece has some inclusions. Iron pyrite, some of which has oxidized? The round piece is another form of quartz where individual little broken pieces get pressed back together into solid stone. It is sometimes knapable, but usually not. I did one time peck and grind a decent full grooved axe out of a piece of it. Usually more of a hard hammer stone type material. The flat gray piece, not sure. Schist?