I found a watch with no brand name and it looks to be gold plate but the stones on the band and case might be real. How do you tell the difference between real diamonds and man made or gold and gold plate? The case back says stainless steel with a japan movement the face of the watch just says quartz with no brand name. I will attach a picture so if anybody might recognize the watch for the brand it might be.

If there is no brand name, I doubt that the stones are worth anything.
Show it to a jeweler.
The first step with metals is to try a magnet on them.
Even gold plating is worth very little, because so little is applied.

If there is no brand name, I doubt that the stones are worth anything.
Show it to a jeweler.
The first step with metals is to try a magnet on them.
Even gold plating is worth very little, because so little is applied.

Reply:
Well tried the magnet thing and the only part it is attracted to is where the pins are connecting the rectangular segments.

You should go for the jeweller to check the golad and diamonds. Because they are experts in this section, we can't check at home easily this.

If it is gold it will be marked... somewhere. It may say 10k, 14k, 18k, 416,. 417, 585. . 750. If there is no name on the watch there is probably more than a 99.9% chance it is not gold unless it was a very, very old piece and the identifying marks had worn off. Assuming that it is not gold the chances of the stones being real diamonds is close to nil.

If it is gold it will be marked...somewhere. It may say 10k, 14k, 18k, .416,..417, .585. .750. If there is no name on the watch there is probably more than a 99.9% chance it is not gold unless it was a very, very old piece and the identifying marks had worn off. Assuming that it is not gold the chances of the stones being real diamonds is close to nil.

Reply:
I see what you mean but from looking at some watches online some not many have no name on the face which what has my interest. But I was think it may be a white metal that is plated gold. That is why the magnet is not attracted to it. Also the stones are most likely rhinestones but you never know it is a rather fancy looking watch. I read that some stones not sure about diamonds will have a blue appearance from light shining on them. To tell this if I hold the watch about 2 feet away and a light is maybe 5 feet away there is a blue appearance what do you think?

Reply:
I see what you mean but from looking at some watches online some not many have no name on the face which what has my interest. But I was think it may be a white metal that is plated gold. That is why the magnet is not attracted to it. Also the stones are most likely rhinestones but you never know it is a rather fancy looking watch. I read that some stones not sure about diamonds will have a blue appearance from light shining on them. To tell this if I hold the watch about 2 feet away and a light is maybe 5 feet away there is a blue appearance what do you think?

I'm no jewelry expert, but as a teacher, we conduct tests on stones. Transparency is one test. You can't clearly see through a real diamond. Also, a real diamond cannot hold heat, so it won't fog up. Scratch tests (on mirrors and glass) used to be reliable, but some cubic zirconias can scratch glass.

Forget the blue reflection, I have not heard that in my 36 years as a jeweler. If you have a loose diamond, you can place it upside down on a thin dark line. A diamond will make the line disappear, you will see a reflection of the line with a CZ and other non-diamonds. The best test is to look at the stone under high magnification. The facet junctions of the diamond will be very sharp. Non-diamonds will have facet junctions that are "rounded" over. Please do not shoot the messenger, but I seriously doubt an unmarked, unnamed watch has precious metal or diamonds. A manufacturer that makes a watch out of precious metal and diamonds is very proud of his work, he will put his name on it and mark it gold so everyone will know.