Hardness of materials are measured by science in this list, that is called the Möhs scale. It says what scratches what: The material that scratches everything is the diamond, that is on the top, and can't be scratched by anything. The material that can't scratch anything is the talc, and it can be scratched by everything, that's why it is on the bottom. So, every material that is above another one can scratch it, more or less, like any other above. Aluminum is only in the third place!! with 2,5 points out of 10 in the Mohs scale, while the glass or steel have 6,5 points out of 10, that is A LOT harder. I don't know if the anodized aluminum is harder than normal aluminum, but this really means that iphone 5 is made of a material that can be scratched by almost ANYTHING. Even copper, that is present on most coins (pennies) and keys, with 3 points in the mohs scale can scratch aluminum, and steel as it is shown in this famous picture: Steel vs aluminum: This makes me think that Apple doesn't care of us at all. They make very fragile products to last less than a year. Iphone 4 and 4s where made of glass, that is so hard.. but also super ultra mega fragile!! One fall one broken iphone, just look for iphone 4 crash tests on youtube... Iphone 4 was the condomized phone, you couldn't use it without protection. http://www.youtube.com/watch?v=K7-OBoDFeDY Iphone 5 is made of a more resistant material against falls, but it is super soft!! http://www.youtube.com/watch?v=OSFKVq36Hgc http://www.youtube.com/watch?v=k2BxL0nRDlY Do you think that apple engineers don't know this?? Mmmhh I don't think so. The faster your iphone looks ugly or broken, the faster you are going to buy a new one. That is called marketing, aggressive marketing.