Quote:
Originally Posted by busterb
Heated in oven then dropped in water. .
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Yes, this is often done with marbles to get the crackled look. (My grandma had lots of these, and I asked her once)
Some people like the look of it, for using in crafts etc.
BTW, I tried this, and most of my marbles cracked, but fell apart. There is an art to getting just the right temp difference. --No cracks about losing my marbles etc. Too easy!
The clear one on the right got struck by lightening, which heated it/melted part, and the rain cooled it fast enough to get the crackles.