stumped on dessert dishes?

I am trying to find info on these dessert dishes for an elderly friend, she (81 yoa) says she got them from her grandmother. The dishes are fairly thin glass with a swirl pattern (very hard to capture on picture, see last pic), some slight imperfections (tiny bubbles etc) and an irridesence to them. I have searched and searched but came up empty so Any info would be realty appreciated.

 

looks like what "R" has as Fostoria stem #879 Mother of Pearl c1915, tho' they don't have a low sherbet shown:
http://www.replacements.com/webquote/FOSMOP1.htm#148647

"R" does show the 879 low sherbet stem in crystal w/o the iridescence:
http://www.replacements.com/webquote/FOSLIV.htm#9933082

 

All I know is "ooh pretty".

 

Thanks a bunch TallCakes the first one is spot on but tall, perhaps they made a short one to. I will have to take a closer look at some of my Fostoria books. Yes they are very nice looking!

 

Hi Coreya,
Fostoria made tall sherbets called "champagnes" and shorter ones for sherbets.
greg

 

Last year I sold an iridescent piece of Steuben...try looking that way.

 

I had first thought it might be steuben but again was unable to find anything, TallCakes provided the best indication on what they are.