Here is one of your images after a trip through PhotoShop. PhotoShop will help, but starting with a quality image is a major requirement.
Depending on the object, consider backlighting. i.e. Hang the object with black thread away from the white background, so that light can penetrate. Then remove the thread in your photo editor.
And if glare is an issue, use a polarized light source plus a polarizing filter on the camera. Plus make the object full frame which may require the use of extension rings or a close up lens.
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