Black Obsidian Fold · Small Horizon is a curated natural-history specimen prepared for the Collectorium T launch selection. The specimen was selected for the relationship between crystal growth, matrix and negative space rather than for size alone.

Its visual identity combines translucent cubic crystals with minor host rock, a cobalt blue, violet and pale matrix palette, and a interlocking cubic group on a low matrix. Recorded display dimensions are 15 × 12 × 10 cm. The gallery documents honest age-consistent wear, photographed without cosmetic concealment; small non-legible inventory glyph and age-consistent handling marks. Each image is a separately composed camera view of the same presentation piece. This presentation record is informational only; ownership, maker attribution, certification, scarcity and provenance verification are outside its scope.