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

Caput mortuum (Latin "dead head") is a purple hematite iron oxide pigment, used in oil paints and dyes. Due to cultural significance of...

Alchemy, a fusion of science, philosophy and mysticism, emerges in practice from the 1st century AD. Among the power civilizations of...

Venice during the Renaissance emerges as a vibrant center of art, culture and commerce, influencing the broader European scope. The...

Antonio Neri is a Renaissance Florentine priest, well known for contributions to alchemy and glassmaking. As a youth Neri is drawn to the...

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...

Ancient Alexandria, jewel of Egypt, is renowned as a city of philosophy, medicine and alchemy. A crucial turning point happens 297 AD....

Although alchemy is often associated with gold-making, another essential skill of the alchemist is to color or dye stones like quartz...

Herbal remedies are ubiquitous in medieval alchemy, a practice combining elements of science, spirituality, and mysticism. Recipes are...

Bernard Trevisan is a prototypical figure in alchemy, constructed by various alchemical writers of the medieval and Renaissance eras in...

In the medieval world, urine is a surprisingly versatile body fluid with a wide range of applications beyond the obvious disposal...

Urine has medical and practical applications though history. Renaissance alchemist Hennig Brand discovers phosphorus by boiling his...

Tellurium is the Latin word for earth. A brittle, non-malleable silvery white metalloid, tellurium (Te) is a rare element having both...

Alchemy has a lifelong relationship with the magic of metals and their multiple manifestations. Metal workers and later blacksmiths...

In Eastern and Western alchemy, the transformation of metals into gold (Au) symbolizes a process of maturation for metal and alchemist....

In alchemy an essential piece of equipment is the hearth or forge. Smelting metal applies heat and a reducing agent to separate one or...

In the European alchemical tradition, the elixir vitae or elixir of life is associated with the philosopher's stone. Legend has it...

The Pill of Immortality or Immortality Pill is a life-giving substance in Chinese alchemy . Also called xiandan (仙丹), jindan (金丹), or dan...

George Ripley (c. 1415 -1490) is an English Augustinian Canon, author and alchemist. One of England's most famous alchemy practitioners,...

Guido Bonatti  (d. 1296 - 1300) is a renowned Italian mathematician, astronomer, and astrologer. Highly respected for his astrological...