Anniversary Guide from Harris Michael Jewelry : eBay Guides

Anniversary           Stone
    1st                     Peridot
    2nd                    Red Garnet
    3rd                    Jade ,  Pearl
    4th                    Blue Zircon, Topaz , Amethyst
    5th                    Pink Tourmaline , Sapphire
    6th                    Turquoise , Amethyst
    7th                    Yellow Sapphire
    8th                    Tanzanite , Tourmaline
    9th                    Amethyst , Lapis , Tiger's Eye
    10th                   Blue Sapphire
    11th                  Citrine , Turquoise
    12th                   Opal , Jade
    13th                   Moonstone, Citrine
    14th                   Agate,  Opal
    15th                   Rhodolite Garnet , Ruby
    16th                   Red Spinel, Peridot , Aquamarine
    17th                   Carnelian
    18th                   Aquamarine, Opal
    19th                   Garnet, Topaz , Aquamarine
    20th                   Yellow Diamond , Emerald
    25th                   Tsavorite Garnet
    30th                   Pearl
    35th                   Emerald , Coral
    40th                   Ruby
    45th                   Cat's Eye, Alexandrite, Sapphire
    50th                   Imperial Topaz
    55th                   Alexandrite, Emerald
    60th                   Star  Ruby
    65th                   Blue Spinel
    70th                   Smoky Quartz
    75th                   Diamond