What do the different birthstone colors symbolize? I was considering buying my girlfriend a pendant set entirely with birthstones and was wondering which color birthstones should I combine. What do the different colors mean?

Birthstones come in colors of the rainbow, ranging from black to white. Here are some of the different colors' properties:
White colored birthstones: the color white is often associated with purity and peacefulness.

• White colored birthstones (or rather colorless birthstones) include colorless sapphires, diamonds and pearls.
  
• Yellow colored birthstones: Yellow is the color of happiness, and hope. Yellow birthstones signify deep intellect and knowledge. Yellow colored birthstones include topaz, citrine, yellow sapphires etc.
  
• Red colored birthstones: red is a color symbolizing strength, prowess, physicality and high energy and emotion. Red colored birthstones include: rubies, red-colored sapphires and red garnets.
•  Purple colored birthstones: purple is a color associated with royalty and grandeur. Purple colored birthstones include amethysts, purple quarts.
  
• Green colored birthstones: The green color is associated with youthfulness, and innocence, prosperity and personal growth. Green colored birthstones include jade, emerald, green garnet.
• Brown colored birthstones: Brown represents level-headedness, simplicity. Brown colored birthstones include agate, bloodstones, sapphires etc.
  
• Grey colored gemstones: grey is associated with courage and strong-headedness. Grey colored gemstones include grey diamonds, agates etc.
  
• Blue colored birthstones: blue indicates royalty, protection and power, as ell as healing. Blue colored birthstones include sapphire, garnet, aquamarine, etc.
  
• Black colored gemstones: Black symbolizes a lack in color, it stands for the universe in its entirety. It indicates harmony and balance. Black colored birthstones include black diamonds, onyx, etc.
  

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