Birthstones are special gems that represent each month of the year. The concept of birthstones is believed by some to have a connection with Priestly breastplate, a ceremonial breastplate that held four rows of three precious stones symbolising 12 tribes. Some believe there is a connection between these stones and the months of the year.Use this guide to birthstones by month and find a beautiful jewellery piece to symbolise birthdays or landmark dates that are personal to you and your loved ones.