First of all, porcelain: I learned that it's a type of ceramic in which the clay contains minerals that, fired at very high temperatures, turn vitreous, rendering the finished product glassy and non-porous. Porcelain is typically white, translucent, extremely hard, and does not need to be glazed to render it impermeable. And - this is important - for centuries you could only get it from China, because no one else knew the formula. Porcelain was highly-prized and difficult to obtain: an expensive luxury item. Any European who could figure out how to make it would break the Chinese monopoly and become very wealthy indeed.
(In this painti

In the early eighteenth century, Johann Böttger, a too-clever-by-half young German alchemist, convinced his friends that he could transmute base metals into gold. Böttger promptly became hot property, and a scuffle ensued between the rival kingdoms of Prussia and Saxony over who would control him. Böttger ended up in a prison in Saxony, where he was informed that he would start producing gold - or else. After spending several years trying to bargain, plead, or escape, he managed to discover the formula in 1707 - not for gold, but for porcelain.
Was the King of Saxony satisfied? Did his discovery instantly make Böttger rich and Saxony the wealthiest state in Europe? No way: this story is just beginning.
The Arcanum has as many twists and turns as a spy novel. It is far more interesting than a book about ceramics has any right to be.