Gem-quality diamonds sparkle under any available light, even moonlight, starlight, firelight and flashlight.
Refraction and reflection both contribute to the sparkle you see in a diamond. Diamonds naturally have a high refractive index, meaning they are 'light friendly'. This property makes diamonds sparkle under any available light: moonlight, starlight, flashlight, firelight and so forth. A well-cut diamond also has reflective qualities: the diamond cutter designed the cut so that light taken in from any facet reflects on other facets and back into the eye of the beholder.
bright purple. (ultra violet).
Some yes, some no. Note that a black light is not a valid test for a diamond.
reflectAnother AnswerCut and polished diamonds both shine and reflect under available light.
Given a light source and movement, a diamond will sparkle in air or under water. +++ I would expect the effect to be greater in air than in water though, because the density difference between diamond and surroundings are that much greater.
Refraction and reflection both contribute to the sparkle you see in a diamond. Diamonds naturally have a high refractive index, meaning they are 'light friendly'. This property makes diamonds sparkle under any available light: moonlight, starlight, flashlight, firelight and so forth. A well-cut diamond also has reflective qualities: the diamond cutter designed the cut so that light taken in from any facet reflects on other facets and back into the eye of the beholder.
Some diamonds -- not all -- display fluorescence once the light source is removed. In this case, the diamond absorbs light of a certain length, and then emits light of a longer wave length. Diamonds usually emit red light under long-wave UV light. Diamonds also emit light under x-ray radiation.
You can click the links, below, to view photos of a raw diamond and of a polished diamond. Their are many diamonds that appear to look like their real. The best way to tell is to put the diamond in a bright light. If the diamond only gives off a little sparkle and shine it most likely is not real.
it is very bright
If the diamond has natural fluorescence -- about 60% of diamonds do -- then, yes, it will glow under black light.
bright purple. (ultra violet).
Some yes, some no. Note that a black light is not a valid test for a diamond.
It doesn't - the 'sparkle' is carbon dioxide gas injected into the drink under pressure.
reflectAnother AnswerCut and polished diamonds both shine and reflect under available light.
Given a light source and movement, a diamond will sparkle in air or under water. +++ I would expect the effect to be greater in air than in water though, because the density difference between diamond and surroundings are that much greater.
In the bright sunlight there are changes that occur when a plant is put under a jar. The plant would most likely shrivel from too much light.
a possibilty