Is it possible to have an array from hstore in PostgreSQL

I am a complete newbie to PostgreSQL. And I was really amazed at the hstore data type provided by Postgres. Well, I use the Rails 3 framework and am developing a simple application that uses PostgreSQL. I want to save an array of hashes in a field. For instance:

authors: [
           {
             name: "abc",
             email: "abc@example.com"
           },
           {
             name: "xyz",
             email: "xyz@example.com"
           }
         ]

Is this possible in PostgreSQL using Rails 3? If so, can someone make it clear how?

thank