Birthstones are stones associated with the month in which someone is born. They are often worn in rings, pendants, or other jewelry as a symbol of their birth month. Most of these are gemstones, making them quite expensive; in these cases, more reasonably priced semi-precious stone alternatives exist.
| Month | Primary Stone | Alternate Stone |
| January | garnet | N/A |
| February | amethyst | N/A |
| March | aquamarine | bloodstone |
| April | diamond | clear quartz |
| May | emerald | chrysoprase |
| June | pearl | moonstone |
| July | ruby | carnelian |
| August | peridot | sardonyx |
| September | sapphire | lapis lazuli |
| October | opal | tourmaline |
| November | topaz | citrine |
| December | tanzanite | turquoise |