What is the best rock i can do a research project on?

I'm doing a research project for my earth science class.

I want a rock that is very interesting and easy 2 research.

I also want to find a lot of information about it on the internet.

Any suggestions?What is the best rock i can do a research project on?
The Wrestler/Actor



You might not get the best grade, but you will have the least boring report.What is the best rock i can do a research project on?
OBSIDIAN!



What Type of Rock Is It? Igneous

What Does It Look Like? Obsidian is a glass and is usually black, although sometimes it may be slightly grayish or greenish. It may include some white crystals that look like snowflakes (snowflake obsidian). It may include swirls of a red color. Obsidian breaks and chips like glass. The location where the chip came out is scoop shaped, like the inside of a clam shell. The chip often has ridges that that are semicircular. This kind of break is called a conchoidal fracture.



What Minerals Make Up the Rock? black glass



How Was It Formed? Obsidian is volcanic. It forms from rapid cooling lava that has a lot of silica. The lava cools so fast that crystals do not have time to form.What is the best rock i can do a research project on?
Quartz