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Have you seen anything like these before?

0 votes

Guys, I found these in Izmir, Turkey. They were on and under the ground. there are hundreds of them. I collected some. I searched a lot but no certain info. Photo with flash they shine a little. They are easy to break. When you break, there is another round stone appears. When I hold tight them, they leave black powder on my hands and can wash with liquid soap, water does not wash away all. They attract magnet but do not attract any other metals. They are heavier than other stones. Does anyone know about these stones?

asked Feb 25 by NafizM (220 points)

1 Answer

0 votes
I would say these nodules formed in some mineral rich waters probably iron rich water and the nodule or geode had millions of years to form the inside mineral concretions. Air forms bubbles in molten rock. When the rock cools it is porous enough fot water to seep into the cavities and the water could be filled with minerals like iron or silicates or anything. When the water evaporates it leaves behind minerals which then crystallize or form a concretion or cementlike substance. Quartz and amethyst and agate are formed like that under varying conditions. The presence of iron turns the quartz purple making amethyst. In this case, while I am not positive, you have a bunch of geodes with iron in them. I'm sorry I can't state it any clearer.
answered Feb 26 by Weasel (40,320 points)
 


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