You need to be in survival not creative, in creative you just break the block and dont get the resources from that said block.
Mine diamonds with an ironpick.
You will have to use an iron pickaxe to mine diamonds.
Nope, you have to mine for diamonds with an iron pickaxe.
Yes - an iron pickaxe is required to mine diamond.
In order to collect diamonds in Minecraft, you have to have an iron pickaxe, if you are wondering how to get iron, you have to have a cobblestone pickaxe and find the brownish looking ore then mine it. Once you have it, you need to cook it into iron ingots then craft an iron pickaxe then there you have it.
You need an iron pickaxe or diamond pickaxe.
Either diamonds are not fully implemented yet in Minecraft PE, or you used the wrong tool, you need an Iron Pickaxe at least.
I don't think you can.
Diamonds can be found in Minecraft by mining. They are usually found in the lower layers of the ground, close to bedrock. Keep in mind that in order to mine diamonds once you have found them you will need an iron pickaxe (or better).
Stone pickaxe
Try this video on YouTube: How to Mine Effectively [Diamonds, Iron, Coal, etc]
To mine diamonds in Minecraft, you have to use an diamond or iron pick. Click and hold with your mouse on the diamond ore until it breaks. A block of diamond should come out of it and into your inventory. Then you have to cook it in your furnace to get diamonds.