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

Stibnite: Mineral information, data and localities.

Invasive Pest of Landscape Trees in Utah by Utah State University Extension - Issuu

Rock Tumbling 101: Beginner's Guide to Polish Rocks - AB Crafty

What are these shiny black rocks?, Page 2

Rock Tumbling 101: Beginner's Guide to Polish Rocks - AB Crafty

Murder Hornets' in the U.S.: The Rush to Stop the Asian Giant Hornet - The New York Times

The {Farmer} & The Florist Interview: Zoë Field - Floret Flowers

Barred Rock -- Coop Ready – Backyard Chickies

Trevor's Lightning Project and the shape shifting psychedelic jam rock of Birdfeeder - AMERICAN PANCAKE

Lightweight Concrete Faux Rock - Made By Barb - 2 step easy method

Molly, one of my beautiful Black Rock chickens., Beverley

What are these shiny black rocks?, Page 2