Erebus Prism Bracelet Mixed Stones

From the Greek "onyx," meaning "nail." In myth, Cupid trimmed Aphrodite's nails, and the clippings turned to stone.

A variety of chalcedony. Most commonly seen as solid black, though true onyx carries black and white banding. Since Roman times, that banding has been carved in relief to produce cameos—the natural contrast between layers used directly as light and shadow. The structure of the stone became the medium of expression.

Found in Brazil, India, and Uruguay. One of very few stones used without interruption from antiquity to the present.

Discipline — Boundary — Resolve

Fixes the axis. When external influence presses in, boundaries sharpen. The density of the black reads as the density of intent — material and metaphor collapse into one.

• Durable in daily wear — no special precautions required

Within the obsidian, fine layers of cristobalite—a high-temperature silica—or gas bubbles reflect light, producing a silver sheen. As with golden obsidian, the internal structure determines how the stone meets light.

Formed only when lava cools within a specific range. Too fast or too slow, and the lustre does not appear.

Found in volcanic regions of Mexico and Brazil. The conditions for silver to emerge from black amorphous glass are extremely narrow. A stone carrying the colour of moonlight—though the light source is inside.

Reflection — Interiority — Candour

Black obsidian surfaced with silver sheen. Where standard obsidian severs the external, this one turns the lens inward. Reserved for those with the tolerance to look at themselves at close range.

• Volcanic glass — chips and fractures on impact
• Avoid drops onto hard surfaces

Tiger's eye in which the oxidation of iron has advanced further. The shift from gold to reddish-brown is a record of what time and environment did to the stone.

The mechanism is identical to golden tiger's eye—crocidolite replaced by silica, fibrous structure producing chatoyancy. Only the colour differs.

The same mineral, at different stages of oxidation: blue (hawk's eye), gold (tiger's eye), red (red tiger's eye). Three timelines of a single mineral. The colour it carries when mined was decided by how long it remained underground.

Urgency — Appetite — Drive

Golden Tiger Eye's focus, plus heat. Decision speed increases; action follows closer behind thought. Suited to those whose caution has become a liability — the ones who keep arriving a step too late.

• Durable in daily wear — no special precautions required