What are these shiny black rocks I keep finding randomly around my

How to Identify Black Minerals

What is this blue crystal/stone? (Picture is below in an answer.) - Quora

Pokemon Scarlet & Violet: How to Get Shiny Stones and Which Pokemon Evolve with Them

A DIY Guide to Collecting Radioactive Rocks Gets Glowing Reviews - Atlas Obscura

Do Black Polished Pebbles Fade?

What are these shiny black rocks I keep finding randomly around my chicken coop? : r/geology

What are these shiny black rocks? TreasureNet 🧭 The Original Treasure Hunting Website

Evolution stone - Bulbapedia, the community-driven Pokémon encyclopedia

Polished Stone Identification - Pictures of Tumbled Rocks

Quartz: Types and Varieties of Quartz (Photos)

What are these shiny black rocks? They almost look like glass. Bonus feline formation. : r/whatsthisrock