Birthstone Calculator
How to use birthstone calculator
- Select the birth month.
- Read its traditional stone or list of stones.
- Compare cultural or jeweler-specific lists when choosing a gift.
- Use the birthday tool for the actual milestone date.
Find the traditional birthstone associated with a birth month.
How the result is calculated
The calculator validates the required dates, units and range before producing a result. Keep the inputs and the selected convention with the output so another person can reproduce it.
Read all calculation conventionsHow to read your result
Keep the inputs and conventions beside the answer. These values explain what the result measures.
| Result field | Meaning |
|---|---|
| Associated stones | A cultural month-to-stone list; some months have multiple customary choices. |
| Birth month | The sole input for this month-based association. |
| Gift selection | A naming aid, not an assessment of gemstone quality, origin or value. |
Some months have more than one customary stone
June can be associated with pearl, alexandrite and moonstone. A selection from this list is a cultural gift convention rather than a date calculation.
Try the example in the calculator above. Change one input at a time and compare the target, interval and selected rules. For a longer explanation read Birthday and Anniversary Dates: Targets, Recurrences and Leap Days.
Conventions to keep with your result
Birthstone traditions vary by country and source. The result does not establish a gem’s quality, authenticity or price.
Birthstone Calculator: frequently asked questions
Why can a month have several stones?
Different traditions and modern lists can include alternatives.
Does the result depend on the birth year?
This month-based list does not.
Is the list a gemstone valuation?
No. It identifies customary associations rather than a product’s quality or value.
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