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Reverse intaglio carved cab

A Glass Buttes Obsidian Collaboration

By Bob Rush In a continuation of writing about Glass Buttes Mahogany Obsidian (the first article was published in the March 2019 issue), this column...

Bench Tips: Getting the Best Pattern

By Bob Rush Over the years I have become almost obsessed with working obsidian. It is rather abundant and the varieties that are possible are...
Cristobalite Snowflakes within obsidian

Cristobalite: Sparkly Snowflake Structure

By Jim Brace-Thompson Silica dioxide (SiO2) Quartz, or silica dioxide (SiO2), is a common mineral beloved by crystal collectors of all stripes. No collection is complete...
Large Apache tear in perlite matrix

Obsessed with Obsidian: A Mineraloid with an Edge

Story and Photos by Steve Voynick When the Spanish conquistador Hernán Cortéz confronted the Aztecs in 1519 in what is now Mexico, horses, steel swords,...