Triangle Concave-Base Nanjiangshi Scholar Walnuts Pair | Premium Select 38.0mm x 37.0mm | Classic Low-Profile Format | Stock ID: NJS-1513C

This listing features the exact naturally hand-matched, collector-grade pair of traditional "Triangle Concave-Base Nanjiangshi" scholar walnuts shown in the photos

Designated under Stock ID NJS-1513C, this premium-tier set showcases an incredibly rare combination of mutational geometry: a Triangle form factor blended with a beautifully defined, Concave Base (Ao Di). The walnuts measure a substantial 38.0mm across the primary horizontal wide edges and field a full 37.0mm in belly depth, presenting a highly compressed, low-profile stature. Sourced from fully ripened wild heritage lines, this single-inventory collector's pair is ready for immediate worldwide shipping.

• Stock: 1 of 1 (Single Inventory / Premium Grade)
• Variety Lineage: Nanjiangshi (Nan Jiang Shi)
• Mutation Profile: Triangle Shape & Concave Base (Sanjiao Ao Di)
• Dimensions: 38.0mm (Width/Edge) x 37.0mm (Depth/Belly)

[The Story of the Triangle Nanjiangshi Lineage]

The Nanjiangshi lineage is universally recognized within traditional wood-bone collecting culture as one of the ultimate heavyweight standards. Sourced from cold, high-altitude northern ranges, this lineage develops an ultra-dense, stone-like shell structure with massive internal chamber walls.

A true Sanjiao (Triangle) specimen represents an elite natural mutation where the walnut grows a rare, three-pointed configuration when viewed from the crown. This expands into a beautifully balanced, multi-dimensional pyramid-like stance with broad dropped shoulders.

When paired with a classic Ao Di (Concave Base)—where the bottom architecture curves cleanly inward around a tightly compressed navel—the structural stability is unmatched. In traditional cultural folklore, this grounded pyramid layout serves as an ancient symbol of unshakable balance, enduring personal foundation, and a deeply centered mind. The mature fibers respond beautifully to bare-hand handling, slowly shifting from a soft golden-tan into a deep, highly translucent ruby-red patina over a dedicated handling journey.

[Product Characteristics of NJS-1513C]

• Commanding 38mm Near-Isometric Silhouette: Measuring a nimble 38.0mm width paired with a full 37.0mm vertical depth across the bellies. This tight 1mm dimensional layout yields an exceptionally full, low-profile posture. The multi-dimensional triangle geometry ensures that the heavy shells stretch comfortably across the palm, providing superb mechanical leverage for a seamless circular roll as captured across "1_14.jpg", "2_13.jpg", and "3_13.jpg".
• Craggy, Deeply Pitted Honeycomb Topography: True to its premium pedigree, the exterior shell is sculpted with a masterfully balanced network of deep honeycomb pockets, jagged natural fissures, and dense micro-folds. This high-relief, continuous texture completely avoids fragile nodes, providing excellent non-slip traction against the skin while delivering an invigorating micro-massage to hand pressure points.
• Flawless Concave Base & Symmetrical Seams: The underside features an exceptionally clean, hollowed-out concave base design. The three primary vertical centerline seams run flawlessly straight down the sides and converge perfectly around a neatly centered, pristine basal navel. This architectural balance ensures superb tracking stability during fast rotation.
• Stone-Dense Acoustic Resonance: Due to its heritage Nanjiangshi lineage and extra-thick internal wood-bone walls, this pair carries significant physical weight relative to its compact footprint. When rotated past one another, the mature material produces a sharp, clean high-pitched ceramic chime rather than a muffled wooden clack.

[Maintenance Advice]

Because the "Nanjiangshi" mutation features a highly responsive, stone-dense shell structure with an intricate network of deep surface pits, it is highly recommended to keep this pair in a sealed bag when resting between handling sessions for the first month. This practice traps natural skin lipids to guide a uniform, blotch-free oxidation process across both the prominent ridges and deep recesses. Handling them directly with bare hands—completely skipping the use of gloves—is the definitive method to naturally mature this canvas into a brilliant, glass-like finish.

[Specifications]

• Variety: Triangle Concave-Base Nanjiangshi (Sanjiao Ao Di Nanjiangshi)
• Stock ID: NJS-1513C
• Dimensions: 38.0mm (Width/Edge) x 37.0mm (Depth/Belly)
• Texture: Deeply pocketed honeycomb wrinkling, rough vertical valleys, compressed three-sided crown, full deep bellies, and a cleanly hollowed concave base.
• Best For: Advanced enthusiasts looking for an uncommon, highly textured 38mm multi-sided pair that showcases professional natural symmetry, heavy bone density, and an exceptionally smooth multi-dimensional roll.