The shell is no longer transparent and looks fully opaque
The egg feels firm when gently rolled or tapped
A boiled egg spins smoothly on a flat surface
A raw egg wobbles more when spun, while a boiled egg spins steadily
The shell may have tiny cracks from boiling, but the egg inside should still feel solid
If peeled, the white and yolk are fully set and not runny
The egg can be left in boiling water for the recommended cooking time based on desired doneness