How to verify that I can see a Gem from Rails?

I am trying to use a RubyGem in Rails.

Given that Rails itself is a Gem, I’m a little confused.

I don’t seem to be able to successfully get at my gem.

Any clever debugging tricks?

I have a require ‘rubygems’ and the specific require_gem for my GEM
file.

What else do I need?

Thanks,
Wes