Embedded Alleghanyite crystals (Top!) from Bald Knob, Alleghany Co., AR, USA– miniature specimen as unique piece
This miniature specimen features a fine-grained, tightly embedded formation of Alleghanyite in dark matrix with striking reddish-brown and pink color zones. The texture shows narrow, undulating bands that give the piece a dynamic, almost layered appearance. The vivid color and natural contrast make this a particularly attractive specimen.
Alleghanyite is a rare manganese silicate of the humite group, typically found in Mn-rich metamorphic rocks. It crystallizes under medium pressure and high temperature conditions and is among the lesser-known representatives of manganese silicates. Aesthetically appealing specimens like this are uncommon.
Geology & Origin:
Bald Knob in Arkansas is considered a classic locality for manganese-rich metamorphic rocks in the USA. The region is characterized by schists and metasediments with high manganese content, which under metamorphic conditions give rise to numerous scientifically interesting silicates. Alleghanyite from this locality is prized by collectors for its rarity and distinctive coloration.