While one can find garnets near the top of the mountain, located throughout the rest of the mountain are Apache Tears - small, round, pieces of black obsidian. These are extremely interesting and easy to find, though not highly prized like the garnets. Following is a photo of loose Apache Tears, similar to those that one can find on a hike up Ruby Mountain.
After our morning hike and garnet search, we also visited a couple of old rock quarries. Rockhounds (like my father) love it, but to the rest of the population it just looks like lots of rocks. Either way, it makes for the opportunity to see some beautiful country. Here's one of the quarries that we visited (I just loved how the sun sparkled off the water!):