Many geodes are made of silicate minerals. These are very resistant to most cleaning agents and do not dissolve. Other associated minerals are sometimes soluble or damaged by cleaning agents so first determine what you want remove. Commonly there are iron minerals spread over the interior of geodes which obscures the crystals. Here is the way that we cleaned them at Ohio State University as learned from the quartz mines of Hot Springs Arkansas. 1: Clean off an opened geode with a standard detergent. 2: A laboratory glass cleaner composed of chromic acid can be used as it will not affect the quartz crystals but might dissolve some others. 3: A solution of Oxalic Acid brought to a boil will remove Iron compounds from Quartz. Let it boil for a while and soak overnight. WARNING: Both of these agents are hazardous chemicals. Do no t get on the skin, do not breathe vapors. Vapors can cause health problems and Oxalic Acid vapors are very reactive so do this outside.
A geode.
No. A geode is not a shape; it is a kind of rock with a hollow interior filled with crystals. Earth's shape is an oblate spheroid.
There is no such thing as a pumice geode. Pumice and geodes form under completely different conditions.
minerals
it is true.
the empress geode of urnguary
A geode with a flint in it is called a "nodule".
The geode crystal for February is Amethyst
Geode is a rock or stone with crystals.
a geode
I'm taking this geode with me.
The found the geode while travelling through the caves. This is a sentence containing the word geode.
The word you're looking for is.... stone.
a geode bro
I have a geode which has been cut in half and polished
Geode is a rock or stone with crystals.
A geode.