Icestone is a stone that can be used to make water freeze or turn all surrounding lava into obsidian(3x3 radius). Comes in 3 forms:Ore,which is a stone block with white streaks.Blocks,which are look like Lapis Lazuli,but white,and can be placed in water to make it freeze over or in lava to turn it into obsidian.Shards,which drop from ore when mined or blocks when broken.4 can be crafted into a block.
Firestone is a stone that can burn forever or dry all surrounding water in a 3x3 radius.Comes in 3 forms:Ore, which is a stone block with orange streaks.Blocks,which look like stationary lava.Evaporates water and burns forever.Dust,Which can be crafted with sticks into torches.Firestone Torches emit a light level of 12.
Firestone? Yay! now I can evolve eevee into flareon!... Oh, it's not that firestone? Aww... On topic though, I think it's pretty good except the names.
Really? Minecraft's ores actually resemble ores in REAL LIFE and the overworld resembles REAL LIFE. They aren't even great ideas, can you seriously imagine Jeb adding this, why do you bother with such a suggestion.
ICESTONE
FIRESTONE
Icestone is a stone that can be used to make water freeze or turn all surrounding lava into obsidian(3x3 radius). Comes in 3 forms:Ore,which is a stone block with white streaks.Blocks,which are look like Lapis Lazuli,but white,and can be placed in water to make it freeze over or in lava to turn it into obsidian.Shards,which drop from ore when mined or blocks when broken.4 can be crafted into a block.
Firestone is a stone that can burn forever or dry all surrounding water in a 3x3 radius.Comes in 3 forms:Ore, which is a stone block with orange streaks.Blocks,which look like stationary lava.Evaporates water and burns forever.Dust,Which can be crafted with sticks into torches.Firestone Torches emit a light level of 12.
I hope you like my ideas.
I support BETTER DRAGONS!

Says the trawl again.
Or you could combine his ideas of Firestone and implement them into your Fierite.
Netherrack. We already have that.
Icestone
Griefing fountains and elevators and conveyor belts is not a good idea.
We already have Water Buckets to make Obsidian.