Prehnite

Prehnite is a calcium aluminium silicate that forms in botryoidal clusters — rounded, grape-like masses that look closer to landscape than to the crystalline geometry most people associate with gemstones. The colour runs from a pale sage to a warm yellow-green, sometimes with pale orange or grey in the same stone. It has a waxy translucence that catches light in a particular, unhurried way.

The name carries a small historical distinction: Prehnite was the first mineral ever to be named after a person. Colonel Hendrik von Prehn, a Dutch military officer and amateur mineralogist, collected it at the Cape of Good Hope in 1788. Before that, minerals were named for their properties, their origins, or their colours. Prehnite marks the moment a stone began carrying a human name.

The crystal tradition keeps it in the neighbourhood of the heart and solar plexus — the chest and upper belly — where feeling and will live close together. Libra is its zodiac home; earth and water are its elements.

Prehnite's intentions are calm, intuition and protection. The tradition offers this as a practical starting point: choose a piece, set an intention in plain words — clarity, patience, the willingness to begin — and let the stone mark the intention's territory. A stone kept on a desk or carried in a pocket is a physical appointment card: a small, repeated reminder that you made a note to yourself and meant it. What the stone does with that note is the practice's own work.

In the catalogue you'll find it as rough nodules, tumbled stones and jewellery — pale green pieces with that characteristic waxy warmth.