A man is talking about some exotic rocks displayed on a table.
Four large rocks are shown as a man discusses where the rocks come from.
a person stands next to a bench that has four rocks on it
A man points at large rocks placed on a table and discusses the types of rocks.
A person looking at two black and two white rocks
A man showing off different tools he has layed down on a bench as he describes them
A man is displaying two types of rocks on a bench.
A man is giving information about large rocks that are found in parts of the country.
A man gestures towards black rocks on a wooden platform.
Four rocks are shown on a table and a man describes them.