A "purple geode" could be a couple of different things; either an amethyst geode, or a manmade specimen of chromium potassium alum.
The former is valued by the overall size, as well as the color and size of the amethyst crystals; they're sold by the kilo and prices are variable.
The latter can be had for under $20, or you could grow one yourself for the price of the chemical.
White and 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
The Color Purple grossed $93,589,701 in the domestic market.
the empress geode of urnguary
The geode crystal for February is Amethyst
I'm taking this geode with me.
Geode is a rock or stone with crystals.
a geode
The found the geode while travelling through the caves. This is a sentence containing the word geode.
$2000
The cost of crystals inside a geode can vary widely depending on the size, type, and quality of the crystals. Prices can range from a few dollars for small, common crystals to hundreds or even thousands of dollars for large, rare specimens. It is best to research the specific type of crystal you are interested in to get an idea of the price range.
I have a geode which has been cut in half and polished