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Obsidian Basalt elements featuring a refined finish to create a bold, modern geometric statement.

Black Basalt Architectural Feature, WA

Project Type: Luxury Residence

Application: Stair Cases & Wall Caps

Material & Finish: Obsidian Basalt    

Technical Highlights: Precision-fabricated Obsidian Basalt elements, Refined, architectural-grade basalt finish, Custom stone coordination, Engineered for modern geometric stair case and wall cap integration

Location: Seattle


Obsidian Basalt, precision-fabricated and custom coordinated for a bold geometric expression.

The project showcases the technical capabilities of Arris Stoneworks through the precise fabrication and installation of bespoke Obsidian Basalt architectural elements. Designed to function as both a modern aesthetic statement and a functional hardscape component, this project features custom-cut staircases and structural wall caps.


Our team engineered each segment to ensure monolithic visual consistency while maintaining the high structural integrity required for exterior applications. The basalt was finished to a precise, refined texture, highlighting its deep, dark tonality and contemporary geometric profile. This installation reflects our commitment to advanced stone coordination, ensuring that every edge, transition, and joint aligns seamlessly with the residence's architectural design.

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