Agate

Agate is chalcedony — microcrystalline quartz laid down in concentric bands inside volcanic rock cavities over tens of millions of years. The banding gives it that unmistakeable layered look, and because the silica solutions deposit at different rates and temperatures, no two pieces ever form quite alike. Colours range from soft grey and cream through blues, greens, pinks and deep reds, and some varieties are named for what the patterns resemble: moss agate, plume agate, fire agate.

The name comes from the Achates River in Sicily — now the Dirillo — where ancient Greeks and Romans dug the stone from quarries. Theophrastus recorded it in the third century BCE; Pliny the Elder described its beauty and the belief that it protected against lightning and storms. The Babylonians carved it into seals a thousand years before that. It is, in other words, one of humanity's oldest worked stones.

The mineralogy makes practical sense: a dense, stable stone worn close to the skin, carried in the pocket, set in a ring. In the crystal tradition it works with the root chakra and sits in the earth element — the grounding end of the register. Gemini claims it in the zodiac. The qualities the tradition links to it are steadiness, composure, and the particular kind of courage that comes from feeling properly rooted.

The suggestion is simple: give the stone a role in a practice. Hold it while you set an intention — steadiness, patience, the willingness to stay — and let it hold that note through the day. A stone you can touch is a place the attention can return to.

Below you'll find what the catalogue holds in agate: tumbled stones, slices, pendulums and jewellery in the full range of its banding.