If your other photos are like that, then they may be simply too dark.
The picture is too dark, and the white balance is not correct. You need to get more light on your main subject.
The problem with shiny objects is that when you put more light on an object, you get very fast overexposure.
If you are new to stock, you should consider these resources: https://helpx.adobe.com/stock/contributor/tutorials.html
Please read the contributor user manual for more information on Adobe stock contributions: https://helpx.adobe.com/stock/contributor/user-guide.html
See here for rejection reasons: https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
and especially quality and technical issues: https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html
The dark, artsy look you're trying to achieve can be quite lovely; but in this case the object is so inadequately lit as to be unrecognizable. You can try to reshoot it, experimenting with various light sources and lighting positions including key, fill and backlights. I have spent many hours playing with objects on a small desktop studio with a light tent, changing out the backgrounds and lighting positions and intensity of light. You also need to be sure that the object you're photographing is immaculate - no dust, fingerprints, smudges, etc.
Proper lighting is essential for all photography and especially in stock images.
1. Use a tripod and longer exposure time.
2. Use standing lights and reflectors to create ambient lighting around the subject.
3. Do not shine lights directly on highly reflective surfaces or it will ruin the photo's exposure levels.
This oil painting by Vermeer is a great example of subtle but effective lighting. It's dark but not so dark that you can't see the subject.