Emeralds are so prone to natural inclusions, or jardin as experts call them, that a flawless green emerald is looked upon with suspicion. While the branch-like fractures are common with this verdant beryl variety, some of them could have been avoided.
Different gemstones have their individual method of recovery. Some are harvested by alluvial methods - and that means sorting through riverbed rocks for the sparkly bits. Open pit or tunnel mining define other methods of hunting the glorious rocks that people covet.