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The article credits Barovier with inventing a glass paste called Chalcedony. But the link to Chalcedony describes it as a natura mineral. I suspect what he invented was called chalcedony because it resembled the mineral, but I suspect they're talking about his invention of transparent glass. I have seen elsewhere (https://www.youtube.com/watch?v=2oDXbFcHliM?t=695 at 11:28) that he did this by mixing his molten glass with ash that's rich in potassium oxide and manganese (made from burning seaweed), to produce the first glass that's transparent. If so, the article should say so, but there's no reference to check. If somebody has a reference, please add this. The invention of clear glass was a major development in world history. It led to windows that kept the weather out, which revolutionized archetecture, and it led to lenses, which helped people see, and led to microscopes and telescopes, both of which gave bolstered science. — MiguelMunoz (talk) 22:43, 4 February 2025 (UTC)[reply]
