A polished agate tower: a standing point with a flat base and a pointed tip. Agate is a banded stone in natural earthy colours. Each piece is natural, so the pattern and colour vary.
Agate is traditionally linked with balance, calm and protection. A tower is said to send its energy upwards, which is why it is often kept on a desk, an altar or a bedside table.
Wipe it with a soft, dry cloth, and avoid water and cleaning sprays.