The name promises gemstones; the reality delivers geology. A dozen volcanic plugs, some narrow as chimneys and others broad as garden sheds, stand in the shallows like a giant's forgotten game of Go. Wave action has carved windows and arches through the softer layers, creating frames within frames when you line up your shot. At low tide you can walk the sandbars between them, shoes squelching, and run your hands over basalt pocked with air bubbles frozen mid-escape millennia ago.
“The volcanic stacks create natural apertures that frame the setting sun with geologic precision twice yearly at equinox.”
A man walking down a sidewalk next to the ocean
Photographers arrive two hours before sunset and stake positions, tripods sinking slightly in damp sand. The light goes honey, then persimmon, then arterial red. The stacks turn to pure silhouette, black cutouts against a sky doing its full repertoire. Couples pose in the foreground; someone's always flying a drone. You'll want the spectacle despite the crowd—the way the sun catches in the rock windows, the sudden flare when it drops behind the offshore stack, the afterglow that turns the wet sand into a mirror.
By full dark the beach empties fast. The rocks become vague shapes, blacker than the water, marked only by the white froth where swells fracture against their bases. The sodium lights from Mihama town glow orange two kilometers down the coast. You leave footprints the tide will smooth by morning.