Obelisk — Clear quartz · 5 cm

An obelisk with even faces, polished along every edge — a form inherited from Egyptian architecture, where it marked the passage of the sun.

Pure quartz, colorless, as transparent as water. The inclusions — veils, frost, phantoms — draw internal landscapes particular to each piece.

What tradition says. Considered the most versatile stone in crystal healing, it is credited with amplifying the intention entrusted to it and supporting other minerals. It is the crystal to begin with.

In practice. It sits as well on a bookshelf as on a ritual tray; its verticality alone creates a visual anchor. Dust with a dry cloth. Sharp edges mark if knocked.

• Quartz is the second most common mineral in the earth's crust; good clear pieces are nonetheless rare.
• Indicative size: 5 cm
• A natural piece: shade, veining and dimensions vary from one example to the next

A decorative object for personal practice. It is no substitute for medical advice or treatment.