The odds of finding that particular rock again seemed slim. When I first noticed it in the leaf litter, it looked organic, perhaps a late season fungus, so I took a quick photo and continued on without noting the location.
But in reviewing the photos I took on that walk, I realized that this was no fungus. The interesting bubbly texture was glassy, not soft, and clearly part of an agate; I saw suggestions of macro quartz crystals within fortification bands. It was quite unlike the common gray, white veined, or sometimes salmon and green rocks that lie scattered everywhere in Menotomy Rocks Park.
Agates are not normally found in eastern Massachusetts. Perhaps a glacier picked this one up, carrying it some distance from its point of origin.
I would welcome the opportunity to examine the agate from all angles, if I ever come across it again, but it somehow seems fitting for this rare treasure to remain hidden in plain sight among the many rocks of its new woodland home.
Radiant Refuge 