Glass Message Board
Glass Identification - Post here for all ID requests => Glass => Topic started by: BRADBURY7308 on October 08, 2011, 08:24:32 PM
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http://cgi.ebay.co.uk/ws/ebayisapi.dll?viewitem&item=200659242445
Im no mdina expert but i felt a kind of anxious sickness coming over me when i saw this completed sale from 5 days ago it appears to me an early crizzle stone complete with harris text to base for what seems like a reasonable price for the holy grail as ive heard them described. Didnt want to spoil the mdina buffs night but here it is hopefully someone from here got it!!! :X: :thud: What you reckon cheap as chips???
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>:D
I don't know - they seem to be getting as common as chips these days.......... :ooh:
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Cheaper than chips and now now Sue....
Passed me by completely :cry: but by chance I happen to know it is on the way to Oz. :usd:
John
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sadly not coming to me in Oz. I didn't see that one either......
JAK
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is it signed by the artist believe the holy grail ones have Mr Harris name ?
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is it signed by the artist believe the holy grail ones have Mr Harris name ?
still very cheap
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I think it was.
I don't care about pawmarks at all.
I prefer things without, to be honest - I reckon the price premium isn't worth paying - the glass speaks for itself, Michael Harris didn't need to put pawmarks on.
My Crizzle Stone isn't marked. It doesn't have an iridescent streak either - and if I could change one thing about it - I'd want the streak of iridesence rather than some elegant engraving on the base.
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what is the iridescent streak i have a mdina weight on ebay at the moment and it has what i called a cloud is that the iridescent streak
thanks
stew
(http://i140.photobucket.com/albums/r38/stewtoyou/th_100_9454.jpg) (http://s140.photobucket.com/albums/r38/stewtoyou/?action=view¤t=100_9454.jpg)
(http://i140.photobucket.com/albums/r38/stewtoyou/th_100_9452.jpg) (http://s140.photobucket.com/albums/r38/stewtoyou/?action=view¤t=100_9452.jpg)
(http://i140.photobucket.com/albums/r38/stewtoyou/th_100_9451.jpg) (http://s140.photobucket.com/albums/r38/stewtoyou/?action=view¤t=100_9451.jpg)
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Silver chloride salts were added to glass because they change the colours of the glass with heat.
The salts themselves melt whan added to glass (thanks, AdamA!) trailing over it, and when it gets hot enough, the silver and chloride ions seperate - chlorine is a gas, it will create bubbles.
Silver makes clear glass yellow -> ochre, depending on the concentrations, and it makes blue glass, greener - this is how all the random coloured effects are achieved in Mdina.
During the additions of various casings of making a piece, silver metal ions can do various things, depending on the heat and what molecules it comes into contact with.
Sometimes, if the glass came away from the metal blowing iron slightly, gaseous silver ions escaped then condensed on the outside of the glass - giving rise to what is described as Mdina iridesence - it's a trail of silvery bluey yellowey mirror like stuff on the outside of the piece - you can see it on the ebay link.
Other times, if the outer casing is particularly thick - the silver molecules do form a "cloud" inside the casing itself - it's very bluey - almost a sort of electric blue - but quite pale.
Now your pics have appeared, I can see there is the silvery iridesence on the top of the weight in the third image.
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thanks sue
first time i have noticed this in any of the mdina items i have had does this mean its an older weight or do they still do it.
thanks stew.
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I suspect it's not really done too much any more - it was an accident in the first place, but possibly deliberately engineered afterwards for the effect as it is so attractive - but it's a very dangerous thing to be doing - the gases are highly toxic.
I can't help wondering if this isn't what triggered Michael Harris' emphysema - which killed him.
Later pieces don't seem to have this iridescent feature
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i have noticed as well it does not seem to be cased in as much clear glass as the other pieces .
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it says in millers 2009 book that only 10 crizzle stones are known to collectors and michael harris made them all. so think someone got a real bargain. not trying to make it sound worse sue
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That is three years out of date now! Don't take Millers as gospel...
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it says in millers 2009 book that only 10 crizzle stones are known to collectors and michael harris made them all. so think someone got a real bargain. not trying to make it sound worse sue
Speaking to me ol mucker Ron Wheeler last night there are now 20 known to exist with only 10 of them being signed.
Mike www.abfabglass.co.uk
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In the wonderful world of collecting, nothing is set in stone unless there is original documentary evidence and even that may be superseded by newer original evidence or new discoveries.
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There are 30 (plus) now known. I had been counting too, but have given up.
I leave fussing over pawmarks to Ron. >:D