Vintage amber glass is usually fairly ornate, so the brackets for shelves to display them can be fairly ornate as well. Black wrought iron or filigree wooden brackets holding up white wood shelves will give your amber glass collectibles a real visual punch. Display shelves for collectibles should compliment the glass collectibles displayed on them as well as being strong enough to prevent a disaster.
Because of the pale yellow color of amber depression glass, you should really consider white decorative shelving that includes a back, so the color shows up. Also, with a back, you can stand some on the plates up to show them off better. Even those shelves for collectibles for darker amber glass will show the pieces off better if they and the background are white or cream colored rather than some strong color.
To display Fostoria glass or a amber glass vase, consider floating corner shelves where the pieces will be relatively sheltered and will reflect back light from two directions. In all cases, floating shelf brackets with glass shelves can show off the glass collectibles to real advantage, as long as the glass shelf brackets are firmly attached to the walls and someone dusts the glass shelves frequently.
Having your amber glass collectibles out where you can see them every day will let you appreciate them more, and with properly hung display shelves to compliment the glass, you will enjoy your collection for a long time.