Geodes come in a large variety of colors depending on the mineral makeup and amount and type of impurities that may be present.
clear
Geodes are rock cavities with internal crystal formations, usually made of quartz crystals. Some geodes are completely solid because they are filled with crystals. These are called "nodules". Geodes can form in gas bubbles in igneous rock, or in rounded cavities in sedimentary rock. Most geodes contain clear or white quartz crystals, but purple amethyst crystals are also common.
Minerals form into crystals or clusters of crystals. In the crust, the most common individual mineral is quartz, and the most common class of minerals are the silicate minerals.
Texture
Neon gas is colourless
A supersaturated solution is most likely to form crystals as it cools.
The most common color of geode that you can buy at the store would be grey with white. Sometimes dyes are added to "enhance" their beauty. The hollow geodes with crystals usually have white crystals.
White and purple
Every color in the rainbow, due to impurities.
Geodes can form in any cavity buried. These wells are usually gas bubbles inside of igneous rocks, pockets under tree roots, vesicles in lava after a volcanic eruption or even animal burrows. Over time, the outer wall of the cavity hardens, and dissolved silicates and carbonates deposited on the inner surface, the slow feed of mineral constituents from groundwater or hydrothermal solutions allows crystals to form inside the hollow chamber. Over millions of years after its formation, the geode returns to the surface through normal geologic processes. The size of the crystals, and their form and color are variable, making each geode unique. Some are clear as quartz crystals, and others have rich purple amethyst crystals. Others can have agate, chalcedony, or jasper. You can not say how the interior of a geode until it is cut or broken, so as to expose its interior. They are common in some rock formations of the United States, Namibia, Mexico and Brazil.
Pure table (sodium chloride, NaCl) is white. Crystals are colorless.
Geodes are rock cavities with internal crystal formations, usually made of quartz crystals. Some geodes are completely solid because they are filled with crystals. These are called "nodules". Geodes can form in gas bubbles in igneous rock, or in rounded cavities in sedimentary rock. Most geodes contain clear or white quartz crystals, but purple amethyst crystals are also common.
Minerals form into crystals or clusters of crystals. In the crust, the most common individual mineral is quartz, and the most common class of minerals are the silicate minerals.
Quartz
most common skittle color is purple.
Diamonds are probably the most well known crystals, but ice is the most common. no what the freak ice isn't a cyrstal... its frozen water =P
In 2010 it again white. red is the most common color
Brown is the most common color.