Crystal
The peacemaker's stone — cool as river water, and quietly, kindly honest.
These are associations the community holds, not settled fact — the more a reading is shared, the bolder it sits.
Amazonite has been cut and worn for at least five thousand years; it turns up in Egyptian burial goods and in Mesopotamian jewellery long before anyone wrote down what it was supposed to do. The name is a misattribution — it was never mined from the Amazon — but it stuck, the way these things do.
Modern practice puts it at the throat: a stone for saying the difficult thing without sharpening it into a weapon. Practitioners who work with it tend to describe the same effect in different words — the noise quiets, and what is left is easier to say plainly. Whether that is the stone or the pause it gives you is a question the stone declines to answer.
Readings practitioners have offered, ordered by how many recognise them. Take what serves, leave the rest.
Carried forward
Heinrich Cornelius Agrippa, Three Books of Occult Philosophy (1533)
Agrippa groups the green stones under Venus and the airy signs, and holds that a stone worn against the skin works differently from one merely carried — proximity being, in his scheme, a kind of argument.
Carried forward
Common in contemporary practice
Kept on a desk for hard conversations. Whether it does anything or simply reminds you to slow down before speaking, practitioners report the conversation goes better — and are mostly untroubled by which it is.
Credit what you carry. Much of this comes from living traditions, and some of it from traditions that are closed — held by particular peoples and not offered for general use. Where you know whose practice a reading came from, name them; where you don't, say that too.