How do I texture objects in an array with different textures?

Hi, I am currently learning how to use unity and I am learning how to make a puzzle piece game. I have stored all the pieces in an array and have labeled them. But now I don’t know how to actually texture each piece individually. Here is my code so far:

using UnityEngine;
using System.Collections;

public class renderTexture : MonoBehaviour 
	private GameObject[] blocks = new GameObject[15];

	void Start()
		Texture image = (Texture2D) Resources.Load("Cuzz", typeof(Texture));

		blocks[0] = GameObject.FindGameObjectWithTag("Cube01");
		blocks[1] = GameObject.FindGameObjectWithTag("Cube02");
		blocks[2] = GameObject.FindGameObjectWithTag("Cube03");
		blocks[3] = GameObject.FindGameObjectWithTag("Cube04");
		blocks[4] = GameObject.FindGameObjectWithTag("Cube05");
		blocks[5] = GameObject.FindGameObjectWithTag("Cube06");
		blocks[6] = GameObject.FindGameObjectWithTag("Cube07");
		blocks[7] = GameObject.FindGameObjectWithTag("Cube08");
		blocks[8] = GameObject.FindGameObjectWithTag("Cube09");
		blocks[9] = GameObject.FindGameObjectWithTag("Cube10");
		blocks[10] = GameObject.FindGameObjectWithTag("Cube11");
		blocks[11] = GameObject.FindGameObjectWithTag("Cube12");
		blocks[12] = GameObject.FindGameObjectWithTag("Cube13");
		blocks[13] = GameObject.FindGameObjectWithTag("Cube14");
		blocks[14] = GameObject.FindGameObjectWithTag("Cube15");

		blocks[0].renderer.material.mainTexture = image;

	void Update()

Cuzz is the name of the image I am trying to put on.

Most likely for all your cubes you use one material Diffuse based on a standard shader. Therefore when you change a texture in block[0], you change a texture of a material and according to all remaining blocks. The simplest in this situation, it to make the material on each block. But you remember that it will increase draw calls (dynamic batching won’t work). There is the second way, to make one material for all blocks and when you change in it a texture, create one more material, being based on the main.