About Scoria

About Scoria: Born from Fire, Shaped by Time

Scoria — also called clinker — forms when ancient coal seams ignite and bake surrounding rock into lightweight, porous stone. Our Wyoming scoria carries the texture, color, and story of Earth’s own furnace.

Close-up texture of Wyoming scoria (clinker) rock
Wyoming scoria (clinker) — vesicular, lightweight, and naturally rugged.

How Scoria Forms

  1. Ancient Coal Deposits: Lush prehistoric forests were buried and compressed into coal.
  2. Underground Fire: Lightning, erosion, or shifts ignite seams that can burn for decades.
  3. Transformation: Intense heat (often >980°C / 1800°F) bakes shale/sandstone into bubble-filled scoria.
  4. Cooling & Exposure: Erosion reveals burned ridges — today’s scoria fields.

Each stone is a physical record of heat, time, and chemistry — a natural filter and design material with character.

Why Wyoming Scoria

Responsibly collected from natural burn formations — no blasting, no chemicals. We sort and grade by size for specific uses.

Lightweight
Easy handling & high volume per lb.
Porous
Excellent drainage & bio-filtration.
pH-Neutral*
*after a good rinse
Durable
Reusable, long-lasting, authentic look.

Popular Uses

Aquariums

Natural biological media & texture for aquascapes.

Reptile Habitats

Holds form, helps with humidity control, looks native.

Planters & Hydro

Aeration for roots; inert after rinse; great drainage.

Decor & Landscaping

Distinct red-black tones with real geologic story.

Aquarium/terrarium layout using natural scoria substrate

A Wyoming Original

Scoria is part of Wyoming’s landscape and history — quiet evidence of underground fires that once reshaped the plains. At ScoriaSupply, we share that story through carefully graded, ready-to-use material.

“From fire to form — each piece tells the story of Earth’s transformation.”
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