Laravel PHP: Validators Class inside 'Models' folder not found - php

Question

I have a folder named 'Validators' inside my 'Models' folder that contains the validation files for creating new records. I have not had problems in the past putting this folder inside the 'Models' folder within my Laravel PHP project but for some odd reason when I try to create/store new records, I keep getting a Class 'Models\Validators\Stone' not found error.
Controller:
<?php
use Acme\repositories\StoneRepository;
use Acme\repositories\PhotoRepository;
use Models\Stone;
use Models\Stone_Photo;
/* 'Validators' folder inside 'Models' folder */
use Models\Validators as Validators;
class StonesController extends BaseController {
/*The stone model */
protected $stone;
/*The stone_photo model */
protected $stone_photo;
protected $layout = 'layouts.master';
/* This is the function that is currently being called */
public function store()
{
$input = \Input::all();
/* This is where the error occurs on this line below */
$validation = new Validators\Stone;
/* Validation code here */
}
}
Stone Validator (app\models\validators\stone.php):
<?php namespace Models\Validators;
class Stone extends Validator {
/* The rules for validating the input */
public static $rules = array(
'stone_name' => 'required',
'stone_description' => 'max:255',
);
}
I have tried running 'php artisan dump-autoload' but that still does not change anything. This implementation has worked for me in the past but for some reason I keep getting this error and I don't know why. Any help is greatly appreciated!