Every jewelry designer has rights. Rights to reproduce the design. Rights to claim the rights of similar designs. Rights to distribute copies of the design or instructions. Rights to sell copies of the design or instructions. Rights to transfer the ownership of the design or instructions. And rights to display the design or instructions publicly.
Which means, if you are creating jewelry in a similar design, with similar beads, as the person you are artistically inspired by, you are essentially infringing on their copyrights. Even if the piece of jewelry that you are creating isn't "exactly" the same, but the color combination is similar and the overall design sense is the same, that is still copying. I've done it before. Sometimes it happens and I don't realize it. I'm sure sometimes it happens to you and you don't realize it. But sometimes the person that is being copied, does realize it and it really does hurt feelings, and seriously does fall into the copyrights jurisdiction.
It's okay to be inspired by a designer. I am constantly inspired by many many designers out there. But I have worked my tail off trying to create a line of jewelry that I can call my own, that screams my name, that can be identified in a crowd. Almost 3 years, I have worked at my designs, to make them my own. A lot of techniques I use in my work, are not innovative. But mixing these techniques with the use of certain beads, and color combinations does create a unique piece of jewelry that I can call my own.
One other point I'd like to make, just because you claim that you are inspired by another designers' work, doesn't make it okay to create a similar piece and sell that piece of jewelry on the internet or anywhere.