Tree Agate Tumbled Gemstone

Tree Agate is a variety of chalcedony, part of the broader agate and quartz family, identified by a pale, milky background threaded with green, moss- or tree-like inclusions of chlorite or manganese oxide rather than the classic banded rings most people picture when they hear 'agate.' It forms in cavities within volcanic rock, where silica-rich groundwater slowly deposits itself around the branching mineral inclusions that give the stone its name.

Tree Agate is a cryptocrystalline variety of quartz called chalcedony, meaning its structure is made of crystals too small to see individually. Its characteristic green, dendritic patterns come from included minerals, typically chlorite or manganese oxide, that grew in branching, tree-like forms while the stone was still forming.

The name 'agate' traces back to the Achates River in Sicily, where the Greek philosopher Theophrastus is credited with first describing the stone around 300 BCE., Because its branching inclusions resemble roots and budding trees, Tree Agate has long been associated in folk tradition with agricultural fertility, carried or buried near crops and gardens in the hope of encouraging abundant growth., and Agate amulets have been worn since antiquity for protection, and Tree Agate's clear link to earth and root made it a natural choice for those wanting a steady connection to home and land.