Today there is more than one "official" listing of the monthly birthstones. Below are some of the more popular ones.

- Wikepedia/Jewelers of America
- International Gem Society
- American Gem Society
- American National Association of Jewelers

Birthstone List from Wikipedia/Jewelers of America

There have been many different sets of birthstones used throughout history and in different cultures. In 1912, in an effort to standardize them, the American national association of jewelers, Jewelers of America, officially adopted the following list; it is currently the most widely used list in the United States and many other locations, including Australia and Thailand. Some alternates have been adopted to be a less expensive substitute for a cut stone.

Tanzanite was added to December by the American Gem Trade Association in 2002.

Birthstone list from The International Gem Society

Compliments of
The International Gem Society

Early in this century jewelers got together and created a new list of birthstones. In the modern list you will find only transparent gems. This makes it much easier to create a mothers ring. Imagine if you needed a pearl, a cabochon of turquoise, a diamond and an emerald. This would be an awkward thing to make look nice.

Another interesting point is the addition of alexandrite. This is an incredibly rare gem and not readily available.

The ancient list is still used considerably. Many people mix the two as they feel best. This is acceptable, the modern list has not replaced the ancient one, but supplemented it.

Birthstone list from The American Gem Society

American Gem Society

American National Association of Jewelers