In describing colored gemstones, the major factors influencing color are hue (position of a color on a color wheel), lightness (tone), saturation (intensity), color zoning, metamerism (color-change ..

People who had eye color change surgery are flooding social media, saying the results make them look younger, more attractive, more interesting, and helps them feel more self-confident.

Greater amounts of colorless sapphire—promoted primarily as diamond substitutes ... natural colorless sapphires can be separated from their synthetic counterparts by their trace-element composition ...

Deep beneath Rome’s Domus Aurea, archaeologists have unearthed a rare ingot of Egyptian blue — the world’s first synthetic pigment.

Researchers introduce an innovative device that combines light emission and color control with clay compounds, offering a ...

Synthetic oil is used in most modern vehicles ... oil cannot get warm enough to burn off moisture and impurities. Change oil every 5,000 miles or every six months, or sooner.

The series of chemical reactions that are used to change natural resources into synthetic products is called chemical synthesis. To make a “natural” product, the natural resource is not chemically ...

Red 3, also known as erythrosine or FD&C Red No. 3, is a red synthetic food dye used to give certain drinks, cough syrups and foods “a bright, cherry color,” according to the FDA. The agency’s report ...

The dye has been used in a number of foods, like maraschino cherries The US has banned the use of a synthetic dye typically added to foods and beverages to give them a bright, cherry-red hue.

In the decades that followed, and with the advent of processes such as flame fusion, synthetic sapphire became increasingly popular in watchmaking. The material is prized for its exceptional hardness ...

Over the first few days of life, a newborn will continue to pass meconium. The color should gradually change from black to dark green, then yellow. After 1 week of life, the stool should no longer ...

Commonly applied to the watch glass and display casebacks of fine timepieces, the sapphire used in the watchmaking industry is synthetic, just as in other sectors such as electronics and optics.