Topaz

specimen number:
2063414

location:
Tarryall Mts, Park Co., Colorado, USA

description:

A loose glassy gemmy pale blue crystal of topaz. In great condition. Cleaved on the base, a choice thumbnail for this Colorado classic.

The Tarryall Mountains, situated in Park County, Colorado, are composed of Proterozoic igneous formations, notably Precambrian granitic plutons associated with the Pikes Peak batholith. Over millions of years, late-stage magmatic fluids rich in fluorine penetrated fractures and miarolitic cavities within the granite, crystallizing into exceptional mineral specimens, including high-quality topaz. Mineral prospectors first documented topaz deposits in the region during the late nineteenth century, triggering small-scale mining and panning operations along local creek drainages. Today, the Tarryall Mountains remain a famous locality for amateur rockhounds and mineral collectors who search the weathered granite scree and pegmatite pockets for gem-grade topaz crystals that range in color from clear and sherry to rich hues of pale blue.

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