This color chart lists all the birthstone colors I have found that are designated in any of the modern, traditional, zodiac, or various ancient tables of birthstones. Several colors are listed for each month because many stones named in birthstone charts are available in a variety of different colors. For instance, garnet, sapphires, agates and jaspers are found in nature in a wide variety of colors and hues. The Modern Birthstone Table is the only chart that names specific colored stones and it names Yellow Topaz for November and Blue Topaz for December.
Also see birthstone list by color (red, blue, violet, etc.)
(Note: many stones like agates and garnets are available in a variety of colors.)