Click rock number for information. The larger crystals are from the top of a mountain in southern New Mexico. Quartz is the most common mineral.
Most sand is quartz.
Some quartz may not look like much on the outside but it might have cracks filled with crystals. This quartz is from a crack in a large rock on the coast of Maine. Sometimes it has small amounts of gold and silver with it, but mostly it is iron and sulfur. These are from a mine in Colorado that had a lot of silver. Selenite roses from near Canyoncito in central New Mexico.