The Island is the only place in skyblock 1.0 and 1.2.
Sand (1.0, 1.1)
To Expand your island.
Between Easy and Hardcore mode.
Build a Cobble stone generator.
Expand the island, Make an area for mobs to spawn at-least 24 blocks away from the island.
Make a mushroom farm.(1.0)
Make some glass.
Make a reed farm.
Make a cactus farm.
Make a wheat farm.
Make some bread.
Make a bed.
Build a forest.
Build a house.
Make a small waterfall and a lake.
Make at least 5 torches.
Make a infinite water source.
Make a furnace.
Official servers (Owned by Noobcrew)
Skyblock.net ( Flagship Server )
Skyblock.org ( Economy Skyblock )
In Skyblock there is a mainland, but in skyblock making a bridge to the mainland is against the rules.
In Skyblock 2.0/2.1 there is a sand platform and in the nether there is a tiny platform made of Glowstone. The island will consist of a chest with some blocks to start out, a tree, and an island of dirt.