An incomplete Python program contains a list of gemstone names.

gemstones = ["Ruby", "Emerald", "Sapphire", "Amethyst", "Topaz", "Opal", "Garnet", "Jade"]

# Amend the loop below to only print every other gemstone starting with the first one ("Ruby")
for i in range(0, len(gemstones)):
    print(gemstones[i])

Amend the code so that it displays every other gemstone in the array, resulting in the following output:

Ruby
Sapphire
Topaz
Garnet

Do not add any further functionality.