Man in workshop meticulously crafting 48-pound acoustic guitar from dark slate materials.

Crafting a 48-Pound Acoustic Guitar from Slate: BeBeau Builds’ Bold Experiment

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Written by Seth Sebastian

2026-09-21

What if an acoustic guitar swapped wood for stone? BeBeau Builds answers this by crafting 48-pound acoustic guitars from 18 pieces of slate. Weighing a hefty 48.7 pounds, this guitar defies norms by functioning as a traditional acoustic instrument despite its unconventional build.

Transforming flat stone into a resonant body through unique design

Creator BeBeau Builds begins by experimenting with body shapes, ultimately choosing an angular form. Using 3D-printed templates, he transfers these designs onto slate, but cutting the inch-thick material proves difficult. The process involves assembling around a repurposed acoustic guitar neck, highlighting the challenge of forming a closed volume from irregular stone slabs.

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Close-up of BeBeau Builds shaping the body of a slate rock guitar with tools.
bebeau builds rock guitar

The initial attempt reveals alignment issues, as variances in slate thickness affect cut angles. A second attempt uses exterior dimensions to guide construction. Temporary hot glue frameworks allow for adjustment as construction adhesive sets, accommodating the natural behavior of stone. This meticulous method is part of the journey of making these distinctive musical instruments.

Slate guitar neck being meticulously sanded by BeBeau Builds in workshop.
bebeau builds rock guitar

From slate to sound through innovative construction techniques

The project advances as BeBeau Builds replaces a broken stone panel and fills gaps between sections. Mineral oil coats the slate, providing a smoother finish before the instrument is strung. Despite its weight and planar aesthetics, the crafting of the stone guitar retains the outline of a traditional acoustic.

Artisan carefully aligns the strings on a partially assembled slate rock guitar.
bebeau builds rock guitar

Surprisingly, the guitar’s sound resembles that of its wooden counterparts, though notes from the slate version fade quicker. The heavy body feels awkward, but pressing strings still produces a recognizable tone. The transformation in this ambitious project lies in weight and construction rather than voice.

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BeBeau Builds applying finish to the body of a unique slate rock guitar.
bebeau builds rock guitar

Ultimately, BeBeau Builds demonstrates that a guitar built from stone can still resonate musically, answering the project’s central inquiry by merging familiar acoustics with robust materials through his unique crafting methods.

Completed slate acoustic guitar resting against a workbench in the workshop.
bebeau builds rock guitar
Guitar neck and fretboard components displayed on a table in the workshop.
Guitar body made of slate being smoothed out with sandpaper.
Artisan adjusting guitar bridge and tuning pegs at the workbench.
Close view of intricate patterns on the acoustic guitar's slate surface.

Source: designboom.com

Frequently asked questions

What material does BeBeau Builds use for his guitar?

BeBeau Builds crafts his acoustic guitar from 18 pieces of slate, creating a 48-pound instrument from stone rather than traditional wood.

How does the slate guitar compare in sound?

The guitar’s sound resembles that of its wooden counterparts, though notes from the slate version fade quicker. The heavy body contributes to an awkward feel, but it still produces a recognizable tone.

How does BeBeau Builds shape the slate for the guitar?

Using 3D-printed templates, BeBeau Builds transfers designs onto slate, but cutting the inch-thick material proves difficult. Temporary hot glue frameworks allow for adjustment as construction adhesive sets, accommodating the natural behavior of stone.