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Natural manganese UV activation
The specimen appears lucent under backlight and develops four directions of perfect cleavage
标本萤石标准立方体晶形发育完好，晶体呈阶梯楔状相互连生构成晶簇集合体；各立方解理面发育层次分明的同心紫色色环，彼此交织形成三角、四边形几何格状纹理，纹路形态高度复刻古苏美尔楔形文字形制。
From Cabeça do Cachorro claim
Rainbow‑Tarnished Cubic Fluorite 4 China Warehouse Natural manganese UV activationRainbowTarnished Cubic Fluorite from Weishan Yi and Hui Autonomous County, Dali City, Yunnan Province, China This cubicform fluorite specimen features neatlyshaped cubic crystals forming dense aggregates. A thin ironoxide film across crystal surfaces creates iridescent tarnish through lightwave interference under ambient light. Backlight illumination reveals translucent purplehued interiors, with welldefined zoning textures inside individual crystals.
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