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Opalescence or play of color is an optical phenomenon associated with the mineraloid gemstone opal, [1] a hydrated silicon dioxide. [2] This effect appears as a milky, translucent glow that changes with the angle of light, often creating a soft, pearly sheen that can display various colors or hues.
Examples of iridescence include soap bubbles, feathers, butterfly wings and seashell nacre, and minerals such as opal. Pearlescence is a related effect where some or most of the reflected light is white. The term pearlescent is used to describe certain paint finishes, usually in the automotive industry, which actually produce iridescent effects.
Chameleons - Colour change signals a chameleon's physiological condition and intentions to other chameleons. [3] [4] Because chameleons are ectothermic, they change color also to regulate their body temperatures, either to a darker color to absorb light and heat to raise their temperature, or to a lighter color to reflect light and heat, thereby either stabilizing or lowering their body ...
Tesla posted its first annual sales drop in more than a dozen years Thursday, undercutting a stock that has soared since Donald Trump’s victory on optimism Elon Musk’s close relationship to ...
The most famous source of fire opals is the state of Querétaro in Mexico; these opals are commonly called Mexican fire opals. [47] Fire opals that do not show a play of color are sometimes referred to as jelly opals. Mexican opals are sometimes cut in their rhyolitic host material if it is hard enough to allow cutting and polishing.
Wayne Osmond, one of the original members of the Osmonds sibling singing group, died Wednesday in Salt Lake City. He was 73. Merrill Osmond, one of Wayne Osmond’s brothers, shared on Facebook ...
People on social media have been asking why the ocean waters in the Myrtle Beach area look so brown. The color change can be blamed on the recent storm that dumped rain on North Carolina, said ...
The Pacific (characterized by nutrient poor surface waters, and deep nutrient rich waters) and Atlantic Ocean circulations favor the production/preservation of silica and carbonate respectively. For instance, Si/N and Si/P ratios increase from the Atlantic to the Pacific and Southern Ocean, favoring opal versus carbonate producers. Consequently ...