Crushed Black Obsidian Coarse Sand - Natural Gemstone

Black obsidian is volcanic glass - formed when lava cools rapidly - giving it a distinctive very dark, near-black color and a glassy texture unlike crystalline stone powders. Our coarse-grind black obsidian sand preserves the largest visible particles, showing the stone's characteristic color at its deepest.

For Jewelry Makers & Crafters

Coarse black obsidian sand is ideal for resin casting, crystal bezels, epoxy river tables, and mosaic inlay. The very dark particles create striking contrast in clear or white resin and pair beautifully with metallic accents - gold, copper, and bronze in particular. Also popular for gothic and industrial-themed jewelry and art.

For Wood Inlay Artists

The coarse grind is a standout choice for wood inlay. Pack into routed grooves, set with epoxy, sand flush, and finish for a dramatic dark inlay against light or medium wood tones. Works equally well in darker wood for a subtle, seamless effect.

For Orgonite & Energy Art

Black obsidian is widely used in orgonite pyramid casting. Layer it with metal shavings and resin for a bold, near-black base layer in pyramid and sculpture work.

For finer applications, see our Black Obsidian Fine powder.

Product Details

• 100% natural black obsidian - volcanic glass, no dyes or synthetics
• Coarse grind: largest particle size, richest dark color
• Sizes available: 0.5 oz (14g) - 1 oz (28g) - 4 oz (113g)
• Color: very dark grey/black (natural volcanic glass)
• For craft and external body use only. Not for ingestion. Keep out of reach of children. Discontinue use if skin irritation occurs.
• Safety: Wash hands after use. Avoid contact with eyes.