From Minecraft Wiki
Ice may refer to:
Ice – A translucent block that generates naturally on frozen rivers, which when melted, yields a water source.
Frosted Ice - A variant of ice that temporarily generates on water if the player walks over it wearing Frost Walker boots.
Packed Ice - Another variant of ice that doesn't melt and which is opaque, generates in ice plains spikes biomes.
Blue Ice - Another ice variant that generates in icebergs and is more slippery than ice or packed ice.[upcoming 1.13]
minecraft:ice, a tag that includes all of those blocks.