I have gotten lots of obsidian and what you need to do is get a diamond pickaxe then mine it out, it will take 15 seconds.If you won't to make obsidian you need still lava and flowing water.If you want to make it your self you need a bucket of water and a lava river then place the bucket on the lava.Once you have done that you mine it out and arrange the blocks in a certain way(a website you could go on is minecraft wiki it will tell you how to craft lots of stuff and the way to arrange the obsidian)then get a flint and steel and lite the obsidian and there you go a portal to the nether thats what you make with obsidian.
Igniting the interior of a 4x5 vertical rectangle made of Obsidian will create a Nether Portal. It will also help against griefers (people who destroy your stuff) in multiplayer because it takes so long to mine. You can use it to build tough shelters that can't be destroyed easily. It lastly is used to craft enchantment tables, ender chests, and beacon blocks.
You can make a Nether Portal - for a how-to on that check the wiki link I provided in the related links below.
Additionally, you can craft an Enchantment Table, Beacon, and Ender Chest - all of these recipes are in the related links below.
Obsidian can be used for a variety of things, including enchantment tables and beacons and it can also be used to make very strong bases. However, it is most commonly used to make a portal to the Nether.
Obsidian is used for building a portal to the nether.
You can build an obsidian portal to the nether (4 block across and 4 blocks down to make a square).
Obsidian is used to make nether portals but can also be used to make structures explosion proof due to it's high blast resistance.
In the upcoming Halloween patch it will be used to make portal to the nexus
Nothing can explode obsidian up to minecraft 1.2.5
make the nether reacter
Make a 5x4 Portal going upwards of obsidian.
14 blocks of obsidian in a block formation
Obsidian is found in really deep creeper caves with magma and water. Magma + Water = Obsidian You need a 3x5 rectangle of obsidian and light it with flint and stone.
No. Only a Diamond Pickaxe can mine obsidian.
Make a 4x5 obsidian frame, and set the middle of it on fire.
i don't think it's possible because pistons can't push or pull (with sticky pistons) obsidian and bedrock.( i tried to do it to make a bank vault)
Unfortunately, you can't because you need Obsidian and in order to get that, you need a diamond pickaxe to mine the Obsidian.
You need a Diamond pickaxe to mine Obsidian.
Obsidian always needs lava, either you make it with lava or water or find where the two have met naturally while underground. It cannot be crafted.