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what is strand in swirl?


ILikeHelmets

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I've been told by some experts they can't say what the strand in the swirl of this marble is, except that it is a WV swirl marble. One person suggested it could be the start or end of a run but it looks like a definite thread of something in the swirl to me, and too pretty to be "trash" that got into the process, although that may be the case.

Has anyone see this in their marbles? I have another marble that is ice blue with white swirls and has the same thing.

 

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Many different things can make threads of color in marbles,  Often different types of contaminants or even some chemical type reactions can lead to the odd threads of different colors.  They seem to be fairly common in Alley Agate marbles

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I'm not an expert.  But I think it's "copper oxide" or "cupric oxide".  CuO.  I think that gets your turquoise and green.  

And copper in a more pure form may be used to get reds. 

 

 

 

 

 

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