The Element Checker is the inspect panel used to look up an element on the ground. Aside from basic info, it surfaces two mechanisms worth knowing: how to recover a removed element, and the special rule that the / emoji prevents a fresh save.
If you remove the discovery row from your saved elements menu, the element is no longer in your local save — but the original world instance can still be re-acquired.
Open the Element Checker on the remaining world instance of that element. The checker panel exposes an Obtain Element action for the element you're inspecting. Clicking it re-adds the element into your saved elements list.
The / emoji (literal slash) is the placeholder the game uses when an element is reset but the system hasn't picked a fresh, valid emoji for it. While an element's emoji is set to /, the element can't be saved into your elements menu by the normal flow.
One carve-out: if your account already had the element saved before the emoji was changed to /, the existing saved copy is preserved.
/, and a save has been removed from your menu, you cannot use Obtain Element to get it back either — Obtain Element refuses to act on slash-emoji elements. The element is fully inaccessible to that account until the emoji is changed to something else.
/ emoji) they can sell or give you an Ownership / Copy through the Marketplace. Once it lands in your saved elements, the rule no longer applies to it from your perspective.