I didn't mean that your bowl was amber, just that it sounded like this shape. Equinox in both the inward turned and outward turned forms was made in clear and frosted green and blue, clear amber (and possibly pink as well), and Jettique with and without polka dots. Both the shapes I showed you were Equinox. If your isn't the inturned rose bowl version, then we need a picture to help with your ID.
Try a photo without a flash and with indirect daylight. I put a piece of white paper on my window sill, stick another piece to the window and pose the item in front of it. The window I use has the light coming over the 'shoulder', so to speak, of the item I'm photographing. Not brilliant but it lights thing well enough.
If you hold your bowl up to a bright light it should look deep purple (or possibly brown) if it is glass. Black glass is never actually black.
Bagley was a company who made many of their items in all of the colours, all of the sizes and all of the finishes and often with hand-painted decoration as well!