1. All Dior sunglasses are made in Italy and nowhere else. If you end up with Dior sunglasses not made in Italy, then you're probably looking at a fake Dior sunglass.
2. Dior sunglasses are made by Safilo Group, which is a Italian company. They own and manufacture Dior sunglasses. If it was made by anybody else, it is not a authentic Dior.
3. Check the fonts on your Dior sunglasses. Many times, fake Dior sunglasses get this part wrong. They attempt to do it as close as possible, but rarely ever get it right. If you have an authentic pair available, compare the fonts used.
4. If your Dior sunglasses claim to be polarized, don't just take their word for it. You can do a simple check if they are polarized. All you need is your computer monitor and your sunglasses! Put your sunglasses in front of the computer monitor and turn it to the right, while looking through the lens at the monitor behind. At a certain angle, if they are polarized, the screen behind will seem to go dark. If it does not do anything, then it is not polarized. If the sunglasses claim to be polarized, but don't show polarization in this test, you either have a fake on your hands or an error was made during manufacturing. I've seen some frames come out of the factory with a faulty polarization, so don't rule that out.
5. All Dior sunglasses come with it's own unique serial number for each of their sunglasses. The serial number should be on the lens and on the inside of the temples, the numbers should be identical to each other. The serial number is always 10 digits consisting of both numbers and letters, also the letters are always in capital letters, lots of Dior fakes won't have the serial number, but if they do, they might forget to do it capital letters.
So if there is no serial number on your Dior sunglasses, you most likely have a fake Dior.
6. The majority of Dior sunglasses will come with the grey box, white rectangle case, small white booklet, grey cloth and the grey cloth/soft carrying case. Unless you have a model from the Dior Les Marquises collection, most of them come with the black box, grey cloth, small white booklet and a soft case, model like the Mohotani comes with the black box.
7. Dior does not come with any kind of authenticity card, which you would think they should as they are not the cheapest sunglasses. Lots of people expect some kind of authenticity document, but unfortunately there isn't any, so don't expect one with your purchase of Dior sunglasses.
8. Authentic Dior sunglasses always has the model name, color code and the size listed on the frames. About 90% of models, the models name is on the left side by itself, then the color code and size is normally on the left temple tip, but like I mentioned, not all models do this, but the majority does. Then the Made in Italy is usually on the right temple.
Here is an example...
Model Name - DIORONDINE
Color Code - 807HD "The color code is always 5 digits, the first 3 numbers are the color of the frame, then the last 2 is the lens color code"
Size - 5818 125 "The first number 58 is the lens width, the second number 18 is the bridge width and the third number 125 is the temple length. All glasses are measured in Millimeters"
9. The best thing to do is to go to a authorized Dior dealer in your area and compare the one you have with the one in the store and they should be more or less identical. As mentioned, certain specifications printed on the interior temples could be on the opposite, but that's common across frames as they could have been an error with that particular batch.
You could ask the person in the store for their opinion, but definitely take it with a grain of salt. Stores are staffed with sales people, after all, and helping you to determine whether the frame you bought at a discount from their prices isn't making them any sales! Even mentioned the words "bought online" seem to automatically trigger them to tell you that your frame is fake-but, you're in luck, you can buy the one they have there! Sometimes you'll find a gem of a salesperson who can truly help, but be aware some are less than knowledgeable.
10. Buying your Dior's online? There are lots of fakes being sold online, but there are also legitimate sellers as well, so don't assume they are all fakes because it is being sold online.
You should look at things like if they are standing by their products, such as "100% Authentic Guaranteed". People who are selling fakes may not want to put that because it isn't authentic, but sometimes they might, look closely and lots of times maybe at the bottom or somewhere around the page, you might see something like "replica Dior", "looks like Dior", "similar to Dior", "good Dior copy" as if they mention that, then they can't really get in trouble because they told you it was a fake vaguely, so read their page carefully.
If you're buying Dior sunglasses on eBay or Amazon, you should look closely at their feedback, if they have too many negatives and mentioning the item they bought was a fake, you might want to be careful. But take a look at the big picture! Let's say they have over 2 thousand feedback's in a year and they only have like 1-3 negatives saying they are fake. Are you honestly going to take the word of 1-3 people? What about the other 1,997 happy customers- are they all that stupid? Not everyone is as skilled as you're going to be at spotting fake frames and may jump the gun! Look at the feedback ratio and go from there.
I hope this guide has brought out a bit of your inner nerd and offered some education so that you, too, can be a fake-detecting, imitation sensing sunglass sleuth!
Keep rockin' those shades,