:rah:
Credit must go to Robbo for the sleuthing, he's found the colour chart for Phoenician Glass, and it looks to me that this is your answer, Leni.
It could be Astra or Fade-away Blue, but your weight does not fade away..... I
think the different colours that appear among the yellow/ochre/reddy bits might be because of different concentrations of silver salts, to me at any rate, it's basically the same pattern - based on the Michael Harris' Mdina "Crizzle" technique - which has various different names depending on who has used it - in WMF, it's in their Ikora range, in Monart, it's Cloissonne, and I just found out last week from an american glassmaker I know on an ME support forum, it has an official name of "primavera". I don't actually know his full name - he's just Rob.
However, I think only Harris "dyansty" glass (and a very few spectacular WMF pieces) introduce silver chloride into the cracks.
link to colour chart:
http://www.phoenicianglass.com/downloads/phoenician_colours.jpg