Why this rock is probably not a meteorite:
No meteorite ever looked like this!
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What is it?
This one's a beauty. It's a complex nodular concretion, probably composed
of chert. Water with dissolved silica passed through veins in a rock,
probably limestone. The silica began to precipitate as cryptocrystalline
quartz (chert), possibly on a quartz sand grain. A small nodule formed
and grew larger. Other nodules also formed and they eventually grew
together. Later, conditions changed and the limestone or other host
rock weathered away leaving the more resilient chert.
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