the heat transfer in the ground when the ground is cold they turn blue and when the ground is hot they turn purple
What you say is true; fluorite is sometimes purple, and does appear in some geodes. I do, however, think that it would be rare to find a geode with purple fluorite
I actually think that indigo is a mix of blue and purple. But mostly purple is what I think. If you want to know then read this or look on the color wheel and see where indigo reaches further into blue or purple.
Mostly blue and green because I am a girl and like the colours pink and purple.
Purple I think I mostly see her nails some kina purple
Blue: CalmBlue-green: FlirtyAmber: CrabbyGreen:HappyRed: ShyPurple: ExcitedI got mostly Purple and Blue!
A number of different minerals can be found within geodes, but they are mostly composed of quartz.
purple and blue
how big can geodes be
blue/purple
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.
They do not form in very cold regions like antartica, but they do form mostly in temprate or chilly regions.Another question that may give you more information on geodes would be ''How does a geode form''.
Between blue and purple, blue is more acidic than purple.