a bit of non reflective glass works well on most papers.
Also, depending on your goals and what you’re using the shots for,
the reflections from putting a piece right on plexi or glass can be
very attractive. I like the way silver pieces look on black plexi,
with the somewhat dim reflection. If you go to my site,
http://noelyovovich.blogspot.com/, and scroll down, you can see some
examples with and without reflections. These were mostly shot by
Larry Sanders using a long swag of black fabric that is a foot or so
below a sheet of non-glare (I think) plexi with lights carefully
arranged to create the gradient look. The whole set up is maybe 3’ x
6’ or more, and he has a fortune in lights and cameras, and a
lifetime of expertise… That’s why I pay upwards of $50 a shot and
have HIM do it.
But for quickie shots that I do for, say, beading event classes, I
often use reflections. The third image down (“Fish Kitchen”) is one
of these.
Noel