1) Amethyst 2) Gem 3) Opal 1) Opal 
A birthstone is a gemstone that symbolizes a month of birth. They are often used in personal jewelry like rings or pendants. ==History of birthstones== ===Western custom=== The first century Jewish historian Josephus believed there was a connection between the twelve stones in Aaron`s breastplate, the twelve months of the year, and the twelve sig....
gemstone associated with the date of one`s birth, the wearing of which is commonly thought to bring good luck or health. Supernatural powers have ...
Gems assigned to different birth months, originally based on astrology. Many different lists exist today. You can view several at birthstones
Birthstones have their roots in ancient astrology, and there have been many birthstone lists used over the years. The most common one today is based on a list first publicized by the U.S. jewelry industry in the 1950s.
a precious or semiprecious stone traditionally associated with a particular month or sign of the zodiac and believed to attract good fortune.