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  2. Realgar - Wikipedia

    en.wikipedia.org/wiki/Realgar

    Realgar (/ r i ˈ æ l ɡ ɑːr,-ɡ ər / ree-AL-gar, -⁠gər), also known as arsenic blende, ruby sulphur or ruby of arsenic, is an arsenic sulfide mineral with the chemical formula α-As 4 S 4. It is a soft, sectile mineral occurring in monoclinic crystals, or in granular, compact, or powdery form, often in association with the related ...

  3. Christ Washing the Disciples' Feet (Tintoretto) - Wikipedia

    en.wikipedia.org/wiki/Christ_Washing_the...

    The scientists of the Gallery also investigated the technical aspects of the painting and the painting materials used by Tintoretto. [14] Main pigments in this painting are ultramarine, red lakes (kermes, madder and lac), malachite and azurite. Tintoretto also used the rare arsenic sulfide pigments realgar and orpiment. An illustrated pigment ...

  4. Orpiment - Wikipedia

    en.wikipedia.org/wiki/Orpiment

    Orpiment and realgar are closely related minerals and are often categorized in the same group. They are both arsenic sulfides and belong to the monoclinic crystal system. They are found in the same deposits and can form in the same geologic environments. As a result, Orpiment and realgar share similar physical properties and histories of use by ...

  5. The Feast of the Gods - Wikipedia

    en.wikipedia.org/wiki/The_Feast_of_the_Gods

    The painting is the first major depiction of the subject of the "Feast of the Gods" in Renaissance art, which was to remain in currency until the end of Northern Mannerism over a century later. [2] It has several similarities to another, much less sophisticated, treatment painted by the Florentine artist Bartolomeo di Giovanni in the 1490s, now ...

  6. Orange (colour) - Wikipedia

    en.wikipedia.org/wiki/Orange_(colour)

    People in ancient Egyptian wall paintings often were shown with orange or yellow-orange skin, painted with a pigment called realgar. The mineral orpiment was a source of yellow and orange pigments in ancient Rome , though it contained arsenic and was highly toxic.

  7. Red pigments - Wikipedia

    en.wikipedia.org/wiki/Red_pigments

    These pigments have been found in cave paintings in France dating to between 16,000 and 25,000 BC. The bright scarlet color, vermilion , was made by pulverizing the mineral cinnabar . A synthetic Vermilion was created in the 9th century with a compound of mercury and sulfur . century, with a mixture of the great majority of red pigments are ...

  8. Agathodaemon (alchemist) - Wikipedia

    en.wikipedia.org/wiki/Agathodaemon_(alchemist)

    Agathodaemon created his 'fiery poison' by fusing a mineral (probably realgar (seen here) or orpiment) with natron.. Agathodaemon (Ancient Greek: Ἀγαθοδαίμων, Agathodaímōn; c. 300) was an alchemist in late Roman Egypt, known only from fragments quoted in medieval alchemical treatises, chiefly the Anepigraphos, which refer to works of his believed to be from the 3rd century. [1]

  9. File:Realgar from Nagyag, Hungary 1813.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Realgar_from_Nagyag...

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