How Big Can a Geode Get?
They Range in Size Between About 1/2 and 3 Inches in Diameter and Formed in the Vesicles of Basalt Flows That Underlie Parts of This Region. Most Oco Geodes...
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Also know, what is the rarest Geode color?
The rarest and most valuable geodes contain amethyst crystals and black calcite.
Similarly, do geodes keep growing? After rock around the cavity hardens, dissolved silicates and/or carbonates are deposited on the insi Geodes are continually being formed within igneous rocks at great depth but cease growth once removed from that environment, growth is dependant upon very specific geophysical conditions.
Similarly one may ask, are geodes worth anything?
According to Answers.com, the value of a geode “… Large amethyst geodes can go for thousands. Baseball sized geodes with non-spectacular quartz or calcite crystals can be purchased for $4-$12. Geodes with uncommon minerals that are sold on mineral auction sites range in price from $30-$500.
Do all geodes have crystals inside?
Most geodes contain clear quartz crystals, while others have purple amethyst crystals. Still others can have agate, chalcedony, or jasper banding or crystals such as calcite, dolomite, celestite, etc. There is no easy way of telling what the inside of a geode holds until it is cut open or broken apart.
