Stibnite‑Calcite‑Selenite Epigenetic‑Growth Specimen 3 base Gibbsite from Dachang Mine

Gibbsite from Dachang Mine

It is light brown in color with well-developed euhedral crystals

whose surface textures resemble the 5

This specimen

The matrix is composed of massive pale yellow calcite

Stibnite‑Calcite‑Selenite Epigenetic‑Growth Specimen 3 base Gibbsite from Dachang MineStibniteCalciteSelenite EpigeneticGrowth Specimen from Weishan YiHui Autonomous County, Dali, Yunnan Province, China Primary stibnite crystals crystallized first within the hydrothermal vein. Orangetoned scalenohedral calcite later precipitated and encrusted the stibnite matrix. Finegrained fibrous selenite fully covered the calcite layer afterward. Exposed calcite crystals are manually chiselled out from the outer selenite layer. This threestage