These are a pair of crags located at the far north end of the Top of the World area. Just Say No, Group Therapy, If 6 was 9 are some quality routes here.
Getting There
Approach as for Chair Rocks & Spoof Rock. From the fence line, continue down the road, bear left a short way past (left) of Chair Rocks. Follow the trail down toward Spoof Rock, but bear right at the first fork. Continue north to The Gemstones.
"Both Gemstones are probably the furthest things to hike to in the area. It would be much quicker to hike here from the CS parking, but I very seriously doubt you could get there without crossing private property."