编号 102849568

编号 102849568

Pentagonite is an extremely rare, bright-blue calcium vanadium silicate mineral
that often forms as slender, radiating prismatic crystals. It is a dimorph of cavansite, sharing the same chemistry but adopting an orthorhombic structure, often featuring unique "fiveling" (five-fold) twinning. Primarily found in the Wagholi Quarries, India, it is highly prized by collectors.