Find the traditional birthstone gemstone for any birth month.
Birthstones are gemstones traditionally associated with each month of the year, a custom with roots going back centuries and still popular for jewelry gifts today.
The traditional birthstone for April is the Diamond.
It matches your birth month to the traditionally assigned gemstone (e.g. Garnet for January, Amethyst for February) based on widely used birthstone lists.
Modern birthstone lists (like the one adopted by US jewelers in 1912, later updated) sometimes assign alternate stones per month, so you may see two or three options.
Tradition — the associations trace back centuries to religious and cultural symbolism, not any scientific link between stones and birth dates.