Copy Blocks
Right-click to copy chiselable block.
Swapping & Placing Blocks
Left-click to replace another block with a copied one. Sneak-left-click to place a coped block on a surface.
In-World Crafting
Chisel a block with a 2x2x10 body of obsidian and 2x2x3 caps of quarts above a crafting table to convert it into a wand item: