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Pleochroism

en.wikipedia.org/wiki/Pleochroism

Pleochroism is an optical phenomenon in which a substance appears to be different colors ... Anisotropic crystals have double refraction of light where light of different polarizations is bent diffe...

Crystals Colour and Light

www.chemistry.co.nz/crystals_light.htm

How do crystals get their color? The presence of different chemicals causes the variety of colors to different gemstones. Many gems are simply quartz crystals ...

Crystal Colors Explained | Crystal Vaults

www.crystalvaults.com/crystal-colors-explained

Colors have many meanings to people mostly based on their culture and religion. But the natural crystals and minerals have no culture and no religion. They are ...

Color: Mineral Properties - The Mineral and Gemstone Kingdom

www.minerals.net/resource/property/color.aspx

Information on the mineral property Color. ... which have slight additions of color- causing elements in some specimens that cause it to be a different color. ... Together with color, a crystal shape can identify most of the better known minerals.

Colorless Gemstones | Causes of Color - Webexhibits

www.webexhibits.org/causesofcolor/6.html

Transition metals can transform even the plainest crystal into a coveted treasure. ... The role of impurities in causing color is different here (see semiconductors).

Learn About Crystals - Home Science Tools

www.hometrainingtools.com/a/learn-about-crystals

Sugar crystals and rock crystals are made up of different chemical elements, too. ... elements the crystal is made out of will make it a unique shape and color.

A crystal of a different color: One chemical forms two colors of ...

www.sciencedaily.com/releases/2013/08/130804081117.htm

Aug 4, 2013 ... Chemists have unexpectedly made two differently colored crystals -- one orange, one blue -- from one chemical in the same flask while ...

The meanings of Colors - Crystal Cure

crystal-cure.com/color-meanings.html

Color symbolism, color and personality, gemstone color & meaning. Color can influence our emotions, our actions and how we respond to various people, things ...

Crystals and Gemstones - Crystalinks

www.crystalinks.com/gemstones.html

Note: Some of the crystals discussed below come in different colors. Crystals can be found raw in nature or cut and polished. They affect each person based on ...

Smithsonian Education - Minerals, Crystals and Gems

www.smithsonianeducation.org/educators/lesson_plans/minerals/minerals_crystals.html

When many different crystals grow near each other, they mesh together to form a conglomerated ... Light interacts with different atoms to create different colors.

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Why do crystals, like quartz and diamonds, form in different colors?

earthscience.stackexchange.com

Apr 18, 2014 ... Some crystals, like quartz and diamonds, form in a variety of different colors. For example, quartz can be clear, 'foggy', pink, yellow, and even ...

How Gemstones Get Their Colors - GemSelect

www.gemselect.com

Mar 11, 2008 ... Learn how the different gem varieties get their color. ... meaning that they are colored by impurities or trace elements in their crystal structure.

Why do different crops of crystals have different colors ...

www.researchgate.net

Nov 7, 2012 ... For the same compounds, why do crystals obtained from different crops not have the same color? And in NMR spectra, they are same?