The Bologna Stone Was a Glowing Mystery for 400 Years - Gizmodo
WEBAug 17, 2015 · The Bologna Stone was discovered in 1603, at the base of a dead volcano near Bologna. When treated with heat, and exposed to sunlight, it would glow for hours—sometimes days. It took 400 years...
Bologna stone | Italian, Fossil, Pliocene | Britannica
WEBBologna stone, any of the dense, silvery white stones first found (1603) on Mount Paderno, near Bologna, by an Italian cobbler-alchemist, Vicenzo Cascariolo, who synthesized from them a luminescent material that glowed at night after being exposed by day to the Sun. Originally thought to be the.
The Bologna Stone: history’s first persistent luminescent material
WEBSep 1, 2012 · The stone later named as the Bologna Stone was among the first luminescent materials and the first documented material to show persistent luminescence. The mechanism behind the persistent emission in this material has remained a mystery ever since.
Solving the riddle of the glowing stones | Opinion - Chemistry …
WEBNov 22, 2016 · The Bologna Stone was the greatest of these secrets. It was first reported around 1603 by an Italian shoemaker named Vincenzo Casciarolo. He had collected glittery, greyish and conspicuously heavy stones from the countryside around Bologna and found that, after ‘calcining’ them (heating them in …
Luminescence: The Never-Ending Story | Topics in Current Chemistry
WEBJun 24, 2016 · Luminescence has fascinated human beings since times immemorial, thanks to a variety of natural phenomena such as aurora borealis, lightening, or luminous animals of various sorts. A landmark in the history of luminescent materials was the discovery of the so-called Bolognian stone in 1603.
The Bologna Stone: History's First Persistent Luminescent Material
WEBAlthough they have been identified for over 1000 years from natural materials found in Chinese and Japanese paintings, one of the first documented luminescent materials is the Bologna Stone,...
Phosphorescent Rock, or, On the Light of the Bolognese Stone
WEBGalileo studied the “Stone of Bologna” or “solar sponge,” produced by alchemists from calcining spar (barium sulfide), which glows in the dark. Galileo inferred from its cool luminescence that light is not the same as heat, but a distinct entity, contra Aristotle.
The Bologna Stone: History’s first persistent luminescent material
WEBThe Bologna Stone: History’s first persistent luminescent material. Marco Bettinelli. 2012. Abstract In 1603, the Italian shoemaker Vincenzo Cascariolo found that a stone (baryte) from the outskirts of Bologna emitted light in the dark without any external excitation source.
The Bologna Stone: history's first persistent luminescent material
WEBSep 1, 2012 · In this work, the Bologna Stone (BaS) was prepared from the natural baryte (Bologna, Italy) used by Cascariolo. Its properties, e. g. impurities (dopants) and their valences, luminescence, persistent luminescence and trap structure, were compared to those of the pure BaS materials doped with different (transition) metals (Cu, Ag, …
WEBIn 1603, an Italian shoemaker, Vincenzo Cascariolo, found that a stone from the outskirts of Bologna emitted light in the dark without any external excitation source though calcination was needed. The stone, Baryte (BaSO 4) mineral reduced to sulphide, was among the first luminescent materials and the