Spark plugs, brake shoes, toilets, sinks, dentures. What are we babbling about, you wonder? Kyanite, of course! These items have one thing in common-porcelain. And Kyanite is used to make porcelain. It’s not all beauty and no brains! This beautiful shimmery blue stone is also very heat resistant and is used to make molds for high temperature metal casting. It’s also used in the automotive and railroad industries. Apart from these industrial uses, we are most familiar with Kyanite as a gemstone. It can be used in all types of jewelry and Jay has demonstrated this in his earrings, rings, necklaces and bracelets. It’s definitely one of our favorite stones!