How to extract property name from a JSON object?

I know that JSON.stringify converts objects to serialized strings. But the output string is a mixture of property names, paired with values. Is there a way to extract only column names from objects?

Here is an example to help you understand what I want to achieve.

var student = {
      id       : 12345,
      full_name: "mike smith",
      address  : "26, Dmm St.",
      email    : "mike@something.co",
      grade    : "B+"
};
$.each(student,function(i,column){
    console.log('The value is :' + column );
});

this will output :

The value is :12345
The value is :mike smith
The value is :26, Dmm St.
The value is :mike@something.co
The value is :B+

I am trying to display the information on a page, but want to the column name to be an attribute hidden from the user (for sorting purposes).

I tried: console.log('The value of ' + typeof column + ' is ' + column);

put that just outputs

The value of string is B+

Is there a way to include the column name inside the string?

Desired output:

The value of id is :12345
The value of full_name is :mike smith
The value is address :26, Dmm St.
The value is email :mike@something.co
The value is grade :B+