Found 3 symbols starting with OB:

The obelisk is an architectural feature that originated in ancient Egypt. Although simple in design, the crafting and transportation of these monolithic masterpieces was a highly involved process, an…
Obsidian is one of nature’s more curious products. Smooth to the touch, it can hold a razor sharp edge, but cracks and flakes under less pressure than most other stones. Nonetheless, it has a very …
Obsidian Dragon egg
Icon used to indicate an Obsidian Dragon egg in the game DragonVale.