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Very intricate! .67


Jeremysvt

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The whole process of making a slag vs. a swirl is the same in the machine-made, more modern process vs. the first hand-gathered, or early machine made, slag days. 
The “batch of glass” was one mix of colors as determined by the maker. In the case of slags or transparent base swirls, white and a transparent based color.
The collector’s eye determines the difference.
I would call this one a slag because of the multitude of actions in the swirling. 
Later slag’s or swirls, made by various companies, look more like a transparent based swirl than a slag because of the lack of multitude in the intense swirling action in the interior/exterior white part of the marble.
Slags are swirls and swirls are slags no matter the color involved. The transparent based ones are known by collectors as slag’s—or in the lack of intense inner/outer action, transparent based swirls. 
The marbles with many/few colors besides white and a transparent base are known as swirls. These are collector terms for the most part.
This one may show fluorescence -does it?
Marble—On!!
 

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2 minutes ago, akroorka said:

The whole process of making a slag vs. a swirl is the same in the machine-made, more modern process vs. the first hand-gathered, or early machine made, slag days. 
The “batch of glass” was one mix of colors as determined by the maker. In the case of slags or transparent base swirls, white and a transparent based color.
The collector’s eye determines the difference.
I would call this one a slag because of the multitude of actions in the swirling. 
Later slag’s or swirls, made by various companies, look more like a transparent based swirl than a slag because of the lack of multitude in the intense swirling action in the interior/exterior white part of the marble.
Slags are swirls and swirls are slags no matter the color involved. The transparent based ones are known by collectors as slag’s—or in the lack of intense inner/outer action, transparent based swirls. 
The marbles with many/few colors besides white and a transparent base are known as swirls. These are collector terms for the most part.
This one may show fluorescence -does it?
Marble—On!!
 

thanks!  No UV on this one.  there are a few other plain white swirls in here somewhere....

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