Polish the crust off a rough ruby without grinding too deep
A rough ruby sits on a spinning brass lap, buried under a dull grey crust. Your job is to wear that crust away with your fingertip — and to stop before you bite into the red underneath.
Drag back and forth across the stone. Each pass grinds the crust away cell by cell, and the colour is your only guide: watch the shade shift as the grey thins, lighten where it is still thick, and move on the moment bare red shows through. The thin spots give themselves away if you are paying attention to the surface rather than to your own rhythm.
The discipline is in knowing when to leave an area alone. Every extra pass over exposed red raises HEAT, and HEAT does not come back down. Let it climb to 100% and the ruby is ruined — not chipped, not scuffed, but finished. So the greedy stroke that feels satisfying is usually the one that costs you the stone. Lift off, shift to fresh crust, and come back to the awkward edges later.
Twelve stones wait in all, each one crusted differently. Some hide their red close to the surface and punish a heavy hand straight away; others carry thick grey that takes patient, even work before anything shows. Learning to read a new stone in its first few passes is most of the skill, and the brass lap keeps turning under your finger whether you have worked it out yet or not.
There is no timer rushing you and no score chasing you — just a rough stone, a turning lap, and a HEAT gauge that remembers every careless stroke. This is a quiet, close-focus game about restraint: a slow reveal that you can spoil at any moment, which is exactly what makes finishing a stone cleanly feel worth it.
Take your time, favour the grey, and let the red arrive on its own.