Onyx

Black bands so even they look drawn on.

Tier: Uncommon
Base odds: 1 in 80
Sell value: 33 coins
Zone: Meadow

With a mutation

Ancient: 1,650 coins
Glitched: 495 coins
Radiant: 165 coins
Shiny: 66 coins

Your luck, pets and passes make rare gems more likely than the base odds shown.