Dungeons How Many How many per chunk
Mob Spawner 595 0.022 (1 in 46.5 chunks)
Building materials
Lava 3,087,096 111.556
Obsidian 38,767 1.401
Mossy Cobblestone 28,379 1.026
Clay 6,902 0.249 (1 in 4 chunks)
Ores
Coal Ore 4,144,639 149.772
Iron Ore 1,921,964 69.453
Redstone Ore 670,146 24.217
Gold Ore 204,604 7.394
Diamond Ore 83,340 3.012
Lapis Lazuli Ore 72,608 2.624
Renewable plant life
Sugar Canes 585 0.021 (1 in 47.3 chunks)
Cactus 506 0.018 (1 in 54.7 chunks)
Non-renewable plant life
Yellow Flower 10,723 0.387 (1 in 2.6 chunks)
Red Flower 2,427 0.088 (1 in 11.4 chunks)
Brown Mushroom 2,237 0.081 (1 in 12.4 chunks)
Red Mushroom 1,161 0.042 (1 in 23.8 chunks)
Pumpkin 241 0.009 (1 in 114.8 chunks)
this was out of 27,673 chunks.
Actual topic found here:
http://www.minecraftforum.net/topic/189 ... -included/