71 results for Obsidian

Did you know there are lots of rocks and minerals that we use in everyday life?  It is estimated that in the United States alone, every person will have used more than 3 million pounds ...

What is Rock Tumbling? Rock tumbling is a fun way of polishing multiple semiprecious gemstones simultaneously in a rock tumbler. A rock tumbler is a piece of equipment that has a plastic or r ...

Hawaii’s official state gem is black coral, designated in 1987. Hawaii does not have an official state mineral or state rock. The state of Hawaii is actually 137 volcanic islands that compris ...

Peru is one of the leading producers of copper, gold, lead and silver. Today, Peru is the largest gold producer in Latin America, and the sixth-largest worldwide, generating billions of dollars in ...

Nevada is a great place for collecting rocks and minerals.  Nevada is the seventh largest state in the union. Yet it's population density is very low. So much of the state is still open and u ...