CosmicOpals
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The bench · 4 min read
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The headdress

Of every piece that's come off this bench, the headdress is probably the most hours per square inch.

A carved Native American headdress in boulder opal — intricate feather and bead detail in dark ironstone matrix with opal color peeking through.

The headdress is boulder opal — Queensland ironstone matrix with opal in the host rock, shaped and carved into a traditional Native American headdress design. The stone itself is maybe 60 by 70mm. The detail level means every feather, every bead, every structural element was worked individually with small-diameter diamond burs.

Carving boulder opal is different from carving Ethiopian crystal. Ethiopian crystal is soft (around 5.5 on the Mohs scale) and relatively forgiving. Ironstone is harder — closer to 6.5 — and the matrix and the opal respond differently to the wheel. Where the bur crosses from ironstone into the color bar, the cutting rate changes. Move too fast and you blow a chip off the edge of the color. The tool path has to account for both materials at once.

Why this design

The headdress silhouette has a lot of vertical relief — the feathers stack and layer so the opal color shows up in different places depending on the angle. As a flat slab this stone is interesting. Carved this way, every feather catches light differently and the color bar fires somewhere new each time you rotate the piece.

A carved Ethiopian crystal opal fish on white quartz and garnet matrix — the whole translucent body glows with blue and violet play-of-color.
Ethiopian crystal carved into a fish — lighter, more transparent material. The color fires through the entire body.
A carved Ethiopian crystal opal turtle resting on white quartz chunks — green and orange fire runs through the body.
Crystal opal turtle on quartz. The color bar ran diagonally through the rough; the turtle shape grew around it.

Three carvings, three different approaches. The headdress is about detail and complexity in a tough material. The fish and the turtle are about finding the shape the color bar already wanted to be in more transparent stone. The work is the same: burs, water, patience, and watching more than cutting.