Hello,
So you need a web platform for your jewelries to reach your target audience.
As its a jewelry website, it must be both chic and user-friendly, where customers can easily find their requirements. Your site can easily be done via, Bootstrap, HTML5, Jquery and a few more coded functionalities. Of course, categorization may differ according to your plans.
As you don't want any available templates, we can offer you experienced web designer and developer to create your website within the given time frame.
Let's discuss
Regards
Prosenjit