Superior gem-finding scrimshaw

The Superior gem-finding scrimshaw is an item that can be made within a player's port workshop at level 90 Fletching once all four scroll fragments of Gem Finding have been retrieved from the Player-owned port minigame. This item will last 4 hours after which the player will need to make a new one. It will be converted to 100k coins if lost on death, if not degraded. If the scrimshaw is degraded, it will be converted to a smaller amounts of coins. For example, if you have 30 seconds left, it will give you 4000 coins.

When equipped and activated, it offers a chance of finding Uncut diamonds, Uncut dragonstones and Uncut onyx gems while Mining, and also allows Dragonstone and Onyx to be found on a successful mining swing that yields an ore. High level rocks have a greater chance to yield these, though lower level rocks can be mined faster, nearly providing the same amount of gems per scrimshaw. The effect does not work with shooting stars, Seren stones, the lava flow mine, concentrated coal, concentrated gold, red sandstone, or gem rocks.