Thanks for the replies!
Like I said, I honestly don't know much about this. It was just through google image searches and ebay that I found fenton used the pattern.
Unfortunately there are no markings on the base. It is a basket weave. There is a seam on the underside that runs all the way from the edge to where the base is formed.
How were these things made? Were they painted? On the black part of the base you can see where some of the black has faded or been rubbed off and it looks silvery...although still iridescent?
There were a few other old glass items in the house:
a glass jar and glass vase that my Grandma tells me could perhaps be "cranberry glass"?
a glass set comprising of a tray, 2 bowls, 2 candlesticks, a larger bowl, and something that looks like a small shallow bowl with a "tower" in the middle. These are all tinted blue.
There is a rose bowl, with a gold coloured lid (possibly gold plated?)
2 large decanters with crystal cut stoppers
and another glass set comprising of a tray, 2 candlesticks and a bowl, these are clear glass
If any of those seem worth posting let me know and I'll try and get a few pictures up.
Thanks very much for the ID on the second item as well Rauville, much appreciated