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The OED defines pyrope (from Greek Πυρωπός, lit. "fire-eyed")" as: "In early use applied vaguely to a red or fiery gem, as ruby or carbuncle; (mineralogy) the Bohemian garnet or fire-garnet"; and carbuncle or carbuncle-stone (from Latin "carbunculus", "small glowing ember") as: "A name variously applied to precious stones of a red or ...
Some examples of glow-in-the-dark materials do not glow by phosphorescence. For example, glow sticks glow due to a chemiluminescent process which is commonly mistaken for phosphorescence. In chemiluminescence, an excited state is created via a chemical reaction. The light emission tracks the kinetic progress of the underlying chemical reaction.
Friedelite is a mineral [2] ... Its color can be pale pink, dark brownish red, red, brown, or orangish red. ... The mineral has a colorful luminescense under UV light ...
A diamond may begin to glow while being rubbed; this occasionally happens to diamonds while a facet is being ground or the diamond is being sawn during the cutting process. Diamonds may fluoresce blue or red. Some other minerals, such as quartz, are triboluminescent, emitting light when rubbed together. [19]
Phosphorescent materials were discovered in the 1700s, and people have been studying them and making improvements over the centuries.The development of strontium aluminate pigments in 1993 was spurred on by the need to find a substitute for glow-in-the-dark materials with high luminance and long phosphorescence, especially those that used promethium.
Scheelite fluoresces under shortwave ultraviolet light, the mineral glows a bright sky-blue. The presence of molybdenum trace impurities occasionally results in a green glow. Fluorescence of scheelite, sometimes associated with native gold, is used by geologists in the search for gold deposits.
Collection of various fluorescent minerals under UV-A, UV-B and UV-C light. Cool looking picture, but also encyclopedic. I had no idea about the range of fluoresing rocks. It appears in Fluorescence and Ultraviolet. It was created by User:Hgrobe. Nominate and support. - Ravedave (help name my baby) 04:58, 3 October 2006 (UTC) support.
Color: Commonly light to dark green; may be blue, brown, colorless, white to snow white, grey, pale violet: Crystal habit: Short prismatic crystals common, may be granular, columnar, massive: Twinning: Simple and multiple twins common on {100} and {001} Cleavage: Distinct/good on {110} Fracture: Irregular/uneven, conchoidal: Tenacity: Brittle ...