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crystal

A Tryst with Amethyst

23 Feb 2021

An attractive amethyst geode sits on my desk. Geodes are rocks with an internal cavity that is filled with crystals of a mineral. In the case of amethyst that mineral is quartz, tainted with iron...

Alcohol should not be stored in leaded crystal decanters

8 Mar 2019

Glass is made by heating sand and then allowing it to cool down. Sand, or silicon dioxide, has a highly ordered arrangement of its silicon and oxygen atoms. In other words, it has a well-defined...

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