When making jewelry, its always helpful to know the stones that related to peoples birth-month. This is especially important if you are making
mothers or grandmothers bracelets. Even if you can't afford the real stone, like ruby or emerald, you can often find the crystal beads that are the same color of the stone you wish to use, so you can use these to represent the birthstone. Here's a list of birthstones to use as a reference:
January: Garnet
February: Amethyst
March: Hematite or Aquamarine
April: Diamond
May: Emerald
June: Pearl or Moonstone
July: Ruby
August: Carnelian or Peridot
September: Sapphire
October: Opal or Tourmaline
November: Topaz or Citrine
December: Turquoise or Zircon