The ancient Greek philosopher Empedocles of Sicily is an important figure in science and metaphysics. Based on Plato's work he...

After the 642 AD Islamic conquest of Egypt, the center of alchemy moves to Muslim lands. Medieval Arab alchemists study and expand upon...

Alchemy begins with several elements coming together at a crucial time in Alexandria, Egypt. As an international glass center, the city...

Hematite, an iron ore with the chemical formula Fe2O3 (ferric oxide), is known for its metallic luster. In earthy form the stone offers a...

Copperas, known chemically as ferrous sulfate (FeSO₄), has been a vital compound across various industries for centuries. Although...

Caput mortuum, Latin for as "dead head" is an ominous name for a valued color. As an iron oxide it's easy to make at home. As a purple...

Rosaceum or rosaceum oil is used in alchemical recipes for coloring gold or gems, and also has medicinal properties found in texts such...

Chrysopoeia is Greek for "goldsmithing." It's the alchemical process or action of turning a base metal such as lead into the noble metal...