Tiger eye: the stone that waits

Turn a tiger eye bead slowly under a lamp and a band of light travels across it, as if something inside had moved. Turn it back and the band returns. This is not a trick of polish. It is the stone's structure, and it is the reason the old merchants trusted it more than any other stone in the bag.

Tiger eye begins as crocidolite, a blue fibrous mineral laid down in fine parallel threads. Over a very long time silica seeps in and replaces the fibres, thread by thread, keeping their direction while changing their substance. Iron in the fibres oxidises and the blue turns to gold and brown. What is left is quartz with a memory of being something else: thousands of parallel channels that catch light along their length and throw it back as a single moving line. The effect has a name, chatoyancy, from the French for a cat's eye. The old markets did not need the word. They called it the eye of the hunter.

The finest material comes from the Northern Cape of South Africa, where the bands are tight and the gold is deep, and from Western Australia, where the colour runs warmer. Much of what is sold is dull, either because the fibres are coarse or because the beads were cut across the grain. A good bead is cut so the fibres run in one direction around the circle, and its band moves cleanly from edge to edge. That is what we look for under the three lights, and most of what we see we send back.

The tradition around tiger eye is a merchant's tradition, not a priest's. On the long roads it was worn on the hand that counted coin, in plain sight. The belief was double: the stone drew fortune, and it kept it. The first half was for the wearer. The second was for the eyes of strangers, and there were many strangers on those roads. A stone whose surface moved when it was looked at was thought to look back.

The other half of the tradition is patience. The hunter's stone waits. It does not chase. In the old teaching, the person who wore tiger eye was reminded every time the band moved that momentum belongs to the one who moves second, and moves once. It is a strange lesson for a stone that draws the eye, and that is the point: the stone is seen so that the wearer does not need to be loud.

That is why it is the only warm stone we use. Against the black ground of everything else in the house, a band of gold is a signal. We set it with barrels of engraved antique gold, which have the weight of a seal, because a seal is the other object that says a thing without saying it.

Three notes on living with it. Tiger eye is quartz, so it is hard, near 7, and does not scratch in daily wear. Keep it out of long direct sun; over years the band can soften. And wear it on the days that are for being seen, and put it back in the box on the days between. Several of our wearers keep a Composure circle for the ordinary week and put the tiger eye on the morning of. A signal that is always on is not a signal.

Three pieces in the house carry it: Focus, Founder and Imperial. They are the same stone in three temperatures. Focus is the plainest, no metal, the band doing all the work. Founder is the seal. Imperial is the warmest and the most formal. If you are choosing your first, choose by the room you will wear it into, and let the stone wait.