Icon Request: stone / rock

[sekurum]

Checklist

• The title of this issue starts with "Icon Request: " and is followed by the new icon name (ex. "Icon Request: Proton Torpedo")
• This icon does not represent a brand
• This request is for a single icon or a matched pair (ex. lock and unlock)
• I've already searched through existing issues, and to the best of my knowledge this request isn't a duplicate
• I understand how new icon requests work

Request type

✨ New icon

Use case

We have a gem(stone), a (tomb)stone, but no icon for a stone / rock ;)

Visual example

similar to the gem icon, but not as clean-cut