Onice Tanzania Viola is a rare luxury purple onyx from Tanzania, admired for its translucent burgundy, violet, plum, white, orange, gold and brown movement. Sometimes associated with names such as Onice Viola, Onice Tanzania Dark or Onice Kilimangiaro Viola, this expressive onyx can appear clouded or linear depending on the direction of the cut, giving designers scope for either atmospheric panels or more directional architectural compositions. While Onice Tanzania Viola is a contemporary luxury onyx rather than a single classical marble of antiquity, it belongs to the wider family of translucent onyx, alabaster and banded calcite stones prized since ancient Egyptian, Greek and Roman times for vessels, carved objects, sacred interiors and decorative architectural detail. Its dramatic colour and natural transparency make it especially suited to luxury interiors, backlit panels, bar fronts, bathrooms, vanity tops, wall features, furniture and statement slabs where rare onyx, rich colour and material atmosphere are central to the design.

Trade sources describe Tanzanian purple onyx as suitable for backlit interior design because of its transparency, and note colour ranges from burgundy and violet through orange, brick and warm pink tones.