Opal Field

Opal Field puts you behind the velvet bench of a master opal appraiser. Fresh rough arrives from the mine; drag to turn each stone, tap the golden rail to aim the warm spotlight, and watch the live spectrum bar as hidden play-of-color blooms across the surface. Every rough has its own secret angle. Lock in your grade at the peak: coverage times color range sets the value, and a true full fire pays a fat bonus.

Beware flawed opals. When their fire burns bright, crack stress climbs; push too long and the stone shatters on the stand.

Earn coins with every appraisal and build out your bench: a midnight velvet turntable skin, a spectrometer that hints the peak, a steady pad that calms cracked stones, a focus spotlight, a chrono loupe for extra time, and prism polish that boosts every payout. All synthesized sound, smooth play, zero ads.

Can you find every full fire?