Agate is a microcrystalline variety of quartz and a member of the chalcedony family. Its crystals form at a scale invisible to the naked eye, lending the stone its signature smooth, compact character and exceptional capacity to take a high polish. Where many minerals assert themselves through sharp geometry or visible crystalline points, agate reveals itself through layering — concentric banding, colour zoning and translucent depth that emerge fully only when the stone is cut and finished.
That banding is agate’s defining physical quality. It forms as silica-rich fluid enters a cavity in the host rock and deposits sediment in successive waves, each one slightly different in mineral composition, colour and opacity. The result reads almost like a geological record — rings of amber, grey, cream, red and blue tracing the stone’s growth with quiet precision. In translucent specimens, light passes through these bands and softens within them, giving polished slices a luminous, near-glowing quality. In denser pieces, the banding appears rich and saturated, with a waxy lustre that deepens beautifully in natural light.
The colour range across the agate family is extraordinary. Moss agate carries green, fern-like inclusions suspended within a clear or milky base — each piece resembling a landscape in miniature. Blue lace agate offers pale, powder-blue banding with a delicate lace-like pattern that has few equals in the mineral world for sheer serenity. Fire agate displays iridescent flashes of red, orange, and gold that shift as the stone moves in the light — the result of thin layers of iron oxide just beneath the surface. Crazy lace agate swirls in looping patterns of cream, red and grey, joyful and endlessly varied. Flower agate holds blossom-like plumes within a soft, milky base. Dendritic agate is pale and translucent, marked with fern-like mineral inclusions that appear almost hand-drawn. Black agate is deep, grounding and sleekly elegant. Banded agate — the classic form — reveals the stone’s concentric rings in full.
In every variety, agate’s polish response is exceptional. Cut surfaces achieve a glassy clarity that showcases the banding in sharp relief; tumbled and smoothed pieces settle into a gentle, waxy sheen. This versatility makes agate one of the most rewarding minerals for cutting, carving and shaping — a stone that honours the craftsperson’s hand at every stage.
Our collection spans a full range of forms and formats, from large decorative agate slices and matched bookend pairs to spheres, raw nodules and polished tumbles. Each piece is hand-selected for its colour, banding quality and natural character. Our agate supply is traceable to its origin and built to grow — if a particular form or variety performs well, we can restock it because we control the supply relationship directly.