Introduction: The color of Clausena lansium L. Skeels cv. Jixin fruit peel is brown (BP), while the mutant cv. Zijin had purple fruit peels (PP). The coloration of the peels was attributed to ...

With a little practice, you can master home painting techniques that mimic the look of high-end finishes such as malachite. A gemstone whose emerald and mint green swirls have been turning heads for ...

and a copper-containing mineral like azurite or malachite to temperatures between 1470 and 1650 degrees Fahrenheit, Egyptian artisans produced a compound known as calcium copper silicate, a rich blue ...

Known as “Egyptian Blue,” it’s among the oldest synthetic pigments in the world, with the newly found ingot weighing more than five pounds. Archaeologists excavating the Domus Aurea, ...

Archaeologists excavating near the Colosseum found a rare chunk of Egyptian blue pigment dating back about 2,000 years. Photo from Simona Murrone and the Colosseum Archaeological Park Across the ...