Set the geode on the concrete, place the chisel in the middle, and tap it very gently a few times with the hammer. Turn the geode a quarter turn and do this again. Continue scoring along the circumference of the geode until you see a crack form all the way around, then pull the two halves apart.Click to see full answer. Regarding this, how do you polish a geode? Polish your rocks. Use a heavier fabric like denim to add a commercial finishing polish to your geode. Rub down the geode gently until it’s as shiny as you want. You can buy commercial finishing polish for gems online or at some hardware stores.Beside above, can you put geodes in a rock tumbler? Throw a geode in the tumbler and it will be toast. If you must experiment, do so with a cheap bits of Brazilian amethyst geode; the crystals will wear off leaving the greyish banded quartz rind, which is much tougher. So if I have nowhere to display them it’s no use to have them. Then, how much are geodes worth? 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. Golf ball sized geodes, uncracked, are sold for about $2 at shows.”How do you break a geode at home?Set the geode on the concrete, place the chisel in the middle, and tap it very gently a few times with the hammer. Turn the geode a quarter turn and do this again. Continue scoring along the circumference of the geode until you see a crack form all the way around, then pull the two halves apart.

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