Aquamarines are found in a range of blues; from a pale pastel to a greenish-blue to a deep color. Darker shades of blue are increasingly rare and in turn, make the value increase. Aquamarine is frequently a pastel gemstone but the color can be more intense in larger gemstones, smaller aquamarines tend to be less vivid.
http://www.wixonjewelers.com/education/gemstones/gemstone-guide/
More gem stone info and resources. See contemporary silver and gold designer jewelry with gemstones. Some stones, like sapphie, opal, jasper or agate, are listed under more than one color because they appear in nature in a variety of different hues and colors. See gemstone jewelry to search for jewelry made with a specific gem. Aqua. Black.
http://www.bernardine.com/gemstones/colors.htm
The color of a Ruby is the most important feature of the gemstone. Rubies are available in a range of red hues from purplish and bluish red to orange-red. The brightest and most valuable color of Ruby is often “a Burmese Ruby” – an indication that it is a rich, passionate, hot, full red color with a slight blue hue.
http://www.wixonjewelers.com/education/gemstones/gemstone-guide/
Color meaning - colored stones. Color symbolism, color and personality, gemstone color & meaning. Color can influence our emotions, our actions and how we respond to various people, things and ideas. Much has been studied and written about color and its impact on our daily lives. Many people believe that colors are powers, and that colored stones are especially powerful. Here are some of the meanings of colors and the energies contained in their corresponding stones. Red - Pink - Brown - Orange - Gold - Yellow. Green - Blue - Purple - Indigo - White - Black - Gray.
https://crystal-cure.com/color-meanings.html
Almandine garnet, also known as almandite, is an iron-rich, red-to-purple garnet that is geologically very common and typically sells on the more affordable side of the garnet price range.
http://geology.com/gemstones/gems/
Chalcedony is a name used for any cryptocrystalline quartz such as agate, jasper, petrified wood, chrysoprase, bloodstone, onyx, sard, and carnelian.
http://geology.com/gemstones/gems/
There are times that I do seek a particular color of gemstone to use in a custom order and this chart makes the process a whole lot easier!. - Carl. I Loved your newsletter of Color of Gemstones, Shells, and more, especially the section entitled how to make a briolette wrap.
http://www.firemountaingems.com/Resources/encyclobeadia/charts/gemstonecolors
The deeper and more vivid the color of green, the more valuable the gemstone. The most valuable and beautiful Emeralds exhibit an intense bluish hue in addition to their basic bold green color. Emeralds, among the rarest of gems, are almost always found with birthmarks, known as inclusions.
http://www.wixonjewelers.com/education/gemstones/gemstone-guide/
Jewelry Maker's Library. Colors of Gemstones, Shell and More. A range of bead materials organized into color families: black and stone, blue and purple, green and aqua, red and pink, white and clear, and more. Thank you for the awesome new tool that is part of the Fire Mountain Website - Colors of Gemstones, Shell and More..
http://www.firemountaingems.com/Resources/encyclobeadia/charts/gemstonecolors
Agate is a cryptocrystalline quartz that is translucent and patterned with bands, plumes, dendrites, or inclusions that produce a colorful, interesting appearance.
http://geology.com/gemstones/gems/
gemstone colors
Colors of gemstone are red, pink, brown, orange, gold, yellow, green, blue, purple, indigo, white, black, and gray. There are different colors in gemstone like Red, Pink, Brown, Orange, Gold, Yellow, Green, Blue, Purple, Indigo, White, Black and Gray.