
Crystal blue stripe is a Michael Harris design and has been used at Mdina since he was there, although the shapes of the things made has changed, as has the overall appearance.
Initially they were not using crystal, but could only get hold of fairly poor quality clear glass - and the quality varied considerably.
I finally got around to wondering last night if the difference in the shade of yellow that became produced was down to the chemical differences between the poorer quality ordinary glass and the later crystal that was used.
With the poor quality glass resulting in a much deeper colour than the almost creamy white that might result from the silver interacting with crystal?
This piece is a much later one, probably fairly recent, with these marks on the base (I really don't think they signify much) and a very white yellow. The shape is also a fairly recent one.