66 results for Obsidian

Peru is one of the leading producers of copper, gold, lead and silver. Today, Peru is the largest gold producer in Latin America, and

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 comprise...

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 of rocks, miner

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 rubber-lin