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Видеоканал на youtube KOI

4 new types of petrified wood (recent additions to our collection):

Petrified wood - it's never enough. Agates in ancient trees.

Petrified trees as they found in natural state

https://youtu.be/s3fWZxqhCd4

Quick guide to petrified wood. Rare and interesting specimens.

Horsetail cones, agates and cell structures in petrified wood

Everything about petrified wood. Part 4.
https://www.youtube.com/watch?v=Ztcg8HLNWRk

Other fossils

Key Facts about Trilobites

Guide to Fossil Shark Teeth.

Solitary (horn) corals: facts and collection.

The story of the phragmocones. Brief introduction to ammonites.

How radioactive are common fossils? Testing rocks with Geiger counter GMC-320
https://youtu.be/NoO4h86edo0