Scheelite - Gemmy Orange Dipyramid, Pingwu

Scheelite from the Pingwu Beryl Mine in Sichuan is the standard against which modern orange Scheelite is measured, and this miniature shows why. A single dipyramidal crystal dominates the piece almost entirely, seated on a small pocket of sulphide-bearing matrix, with the warm honey-to-amber body colour and glassy surfaces that made the locality famous during its productive years. The habit is the classic Pingwu form: a sharp, bipyramidal Scheelite with broad triangular faces meeting at crisp edges, giving the crystal a compact, almost geometric solidity. It is a fat, blocky individual rather than a thin plate, and it reads three-dimensionally from every angle, the pyramid faces stepping subtly where growth layers have stacked across them. A smaller subsidiary crystal emerges at the lower left, and a partially intergrown neighbour is visible at the right edge, but the eye never leaves the main individual. Colour is the great strength here. In ordinary reflected light the crystal is a saturated marmalade orange, deepening toward russet where internal veils and included material thicken the interior. Where light passes through the upper termination the tone brightens markedly to a clean golden amber, and the uppermost tip is genuinely gemmy, with a faintly pinkish-lilac cast along the apical edge where the thin margin transmits rather than reflects. Internal fractures and growth planes catch the light as silvery flashes suspended within the warm body, a characteristic of the material rather than a flaw of this piece. Lustre is bright and vitreous to sub-adamantine, and the crystal behaves theatrically under directional light: turn it slowly and the broad pyramid faces flare one at a time, each catching and then releasing the light as the mirror plane passes. Scheelite's high refractive index does real work on a crystal this clean. The matrix is modest but useful, a granular crust of shiny muscovite with associated micaceous material banked along the lower right, its metallic sparkle providing cool contrast against the orange and anchoring the crystal visually. It supplies scale and context without competing. Scheelite is soft by collector standards and cleaves readily; on a dipyramid the apex and the long meeting edges are exactly where handling damage accumulates, so the integrity of the termination on this crystal is worth noting. A gemmy, undisturbed tip is the single hardest thing to find in this material. As a miniature, the specimen carries more presence than its footprint suggests, being essentially a single showpiece crystal with just enough matrix to justify itself. Under a warm spotlight it glows from within like a piece of amber set on metal.