Healing crystals and stones

Healing crystals is a shop category, not a claim we make. It covers stones sold with an intention attached — calm, focus, protection, sleep — and the pages here record which stone got which reputation and when, without telling you it works. No stone has been shown to change a physical condition, and anything sold as a treatment for one is being sold dishonestly. What a stone can do is act as a physical reminder, an object in your pocket tied to an intention you set on purpose.

The part worth knowing before buying is what you are holding. Of the 43 stones in this reference, 13 are the same oxide, silicon dioxide:

• as coarse quartz — Clear Quartz, Amethyst, Citrine and others;
• as chalcedony, the banded microcrystalline form — Agate, Onyx, Carnelian and others;
• as opal, the same oxide with water trapped in it.

That is 30% of the shelf — one substance under 13 names, separated by traces of iron, titanium or natural irradiation, and each name carrying a different meaning.

That makes the meanings a cultural record rather than a property of the rock, and they are labeled that way throughout. The intention pages above list what each tradition reached for; the gemstone reference gives the formula, the Mohs hardness and where each stone is mined, so the two halves stay separate.