Rainbow‑Tarnished Cubic Fluorite from Weishan Yi and Hui Autonomous County, Dali City, Yunnan Province, China

This cubic‑form fluorite specimen features neatly‑shaped cubic crystals forming dense aggregates. A thin iron‑oxide film across crystal surfaces creates iridescent tarnish through light‑wave interference under ambient light. Back‑light illumination reveals translucent purple‑hued interiors, with well‑defined zoning textures inside individual crystals.

彩虹锖色立方体萤石

产地：中国云南省大理巍山彝族回族自治县。立方体晶型萤石标本，规整的立方体晶体紧密聚合。表层氧化铁薄膜借助光波干涉效应形成彩虹锖色。背光照射能够看见半透明紫色内核，单颗晶体内部发育层次分明的环带构造。

Dimension : 7×5.6×4.5cm.

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