Chlorophyte

Chlorophyte is a unusual case, being both ore, and material, in a sense. It comes from Terraria.

Chlorophyte is a green ore found in the ground. It prefers muddy environments, being able to grow and duplicate in mud.

It's apparently a living ore, somehow, breathing, and, as mentioned above, being able to grow, which ore shouldn't be able to do. Hence, it counts as both a ore and a material, due to it's bizarre nature. It feels plantlike to the touch, and seems to be able to be replicated infinitely as long as you have mud.

While it does not require sunlight or water, it seems to prefer it, "blooming" into a variety of colors if treated like a normal plant. These variants are no different to normal Chlorophyte, aside from color, and seem to be popular to mix and match as "Miner's Bouquets", as bundles of the blooms are often called. The most common types are green, pink, and white, however, specialized breeders have made variants of all colors, the best kind growing two-tone blooms.