Your Gem names in the Locale file are messed up.
Currently Ruby's are Topaz
Sapphires are Ruby's
Emerald are Sapphire
and Topaz are Emeralds.

Also your spacing is causing blank squares to appear in the names of these items.

Otherwise, love your mod man! keep up the good work :)

[item-name]
ruby-ore=Ruby Ore
ruby-3=Raw Ruby
ruby-4=Cut Ruby
ruby-5=Polished Ruby

sapphire-ore=Sapphire Ore
sapphire-3=Raw Sapphire
sapphire-4=Cut Sapphire
sapphire-5=Polished Sapphire

emerald-ore=Emerald Ore
emerald-3=Raw Emerald
emerald-4=Cut Emerald
emerald-5=Polished Emerald

amethyst-ore=Amethyst Ore
amethyst-3=Raw Amethyst
amethyst-4=Cut Amethyst
amethyst-5=Polished Amethyst

topaz-ore=Topaz Ore
topaz-3=Raw Topaz
topaz-4=Cut Topaz
topaz-5=Polished Topaz

diamond-ore=Diamond Ore
diamond-3=Raw Diamond
diamond-4=Cut Diamond
diamond-5=Polished Diamond

laser-rifle-battery-ruby=Ruby laser rifle battery
laser-rifle-battery-sapphire=Sapphire laser rifle battery
laser-rifle-battery-emerald=Emerald laser rifle battery
laser-rifle-battery-amethyst=Amethyset laser rifle battery
laser-rifle-battery-topaz=Topaz laser rifle battery
laser-rifle-battery-diamond=Diamond laser rifle battery

Yup, that's on me. I should have caught that, fix coming shortly with a couple more buildings.