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In the past, purple dye was very expensive to produce, with the first compound used as one, Tyrian purple, being made from the mucus of a family of sea snail found only in the eastern Mediterranean and off Mogador Island near Morocco. To produce small amounts of it, it was required to obtain the mucus of thousands of snails, which was extremely ...
It was difficult for potters to excavate purple clay as the clay were normally located 30 meters below the surface. With the technology advancement, the excavation of purple clay has flourished, so has Tianqing clay. Tianqing clay is distinguished from the generic purple type by: Its dark liver color after firing. [9] Its markedly sandier texture.
In the 18th century, purple was a color worn by royalty, aristocrats and other wealthy people. Good-quality purple fabric was too expensive for ordinary people. The first cobalt violet, the intensely red-violet cobalt arsenate, was highly toxic. Although it persisted in some paint lines into the 20th century, it was displaced by less toxic ...
Ultramarine was historically the most prestigious and expensive of blue pigments. It was produced from lapis lazuli, a mineral whose major source was the mines of Sar-e-Sang in what is now northeastern Afghanistan. [1]
Ruby chocolate is a style or distinct variety of chocolate that is pink or purple in colour. Barry Callebaut, a Belgian–Swiss cocoa company, introduced it as a distinct product on 5 September 2017 after beginning development of their product in 2004.
Silk Cut sponsored Jaguar XJR-9 for Jaguar's sportscar efforts except in North America because of IMSA's tobacco ban, where Castrol was sponsor.. Silk Cut were the title sponsors of rugby league's Challenge Cup for 16 years, between 1985 and 2001, and the competition was known as the 'Silk Cut Challenge Cup'.
Crocus display the general characteristics of family Iridaceae, which include basal cauline (arising from the aerial stem) leaves that sheath the stem base, hermaphrodite flowers that are relatively large and showy, the perianth petaloid with two whorls of three tepals each and septal nectaries.
Blue John (also known as Derbyshire Spar) is a semi-precious mineral, a rare form of fluorite with bands of a purple-blue or yellowish colour. In the United Kingdom it is found only at Blue John Cavern and Treak Cliff Cavern at Castleton in Derbyshire. During the 19th century, it was mined for its ornamental value, and mining continues on a ...