Bone ash is used in opaline glass. You could find loose ash in any of these Leerdam pieces
LINK. There are also the funerary glassware in which your loved ones ashes are mixed with the metal while making the object.
LINKMeanwhile what Anne has high-lit is the illogical aspect of names as a determinant of value. Master craftsmen become that way through practise and a good eye, rightly their finest works are lauded - but as few can afford those special items others take the Maestros failures and average work. In the age of the connoisseur there were so few collectors that there was plenty to go around, today collectors and producers can be numbered in millions (past and present) and fame becomes fleeting for some and lasting for a few. With such numbers it is highly likely that "one off" masterpieces by the likes of Frederich Chomeley or Susan Chi-Lin do exist... but they remain unknown and never to be discovered. The objects because of their rare beauty will almost certainly do above average on eBay, or elsewhere, but might not exceed the average $400 that unispired mass produced Lalique ashtray would fetch, not to mention a Swarovski item. Who are the collectors that spend such sums on these objects with names but little or no aesthetic merits.
Connoisseurship also, largely, rejected proletarian and industrial glassware as of no importance, yet today there is a healthy interest in such objects and in general at sensible prices. Collectors of these mundane items get to experience a living history with no pretensions, they can compare the utility value of their collection with that of modern day accountant led design.
Not being a particular follower of Murano, I find much of it blobby and indifferent, some I find attractive and a few pieces have left me with a life enriching experience. But I can get almost as much joy from discovering a new Moncrieff ink-bottle or a length of Gauge tubing... my quest for a red-striped gauge glass has yet to be fulfilled. This particular vase is one of a type of decoration that I like but to be honest I do not think it is a 'great' piece of glass nor particularly well executed. When I first saw it, I was immediately reminded of similar Polish glass that I lust over, so here I had a focal point of comparison. But the piece, of this genre, that got me hooked was owned by another member here... I regularly look for an example of its equal but there is always something not quite right. It is of course intriguing that two others were also leaning to Poland. I wonder if it is a Polish design originally, that has been copied by Muranese and others.