Obsidian Inserts

If you want to make an explosion-proof base in Minecraft,  you have one option:  obsidian, which is not the prettiest of blocks.  I suggest an obsidian insert that can increase the blast resistance and mining time of any block.  You could get three inserts by putting one obsidian in a crafting table.  To put the obsidian insert into a block, you would right-click or tap the block with the insert in your hand.  This would change the block so that it has increased blast resistance and mining time.  The block would also have a black line running across the top to represent the obsidian that has been slid inside.