Nickel Sulfide Inclusion - A World Inside Glass

A nickel sulfide inclusion is a tiny impurity formed when the glass is first made from sand and other powders. The nickel sulfide inclusion looks like a perfectly round, golden golf ball. It is special because it grows over time and can spontaneously break tempered glass. even if nobody is near. This video also shows an amazing world of form and color found in a very small area of clear glass when glass is viewed under a microscope.
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