Microcline

specimen number:
2062654

location:
Crystal Peak, Florissant, Colorado, USA

description:
Light bluish green blocky crystals of microcline, this the variety known as amazonite, measuring to 3.0 cm in height on a pegmatite matrix. In good condition. The specimen comes with a previous label from the collection of Ray DeMark. He collected the specimen in 1957.

Crystal Peak in Colorado is located within the rugged Pikes Peak batholith, a massive granitic intrusion formed over one billion years ago that slowly cooled to create gas-rich pockets known as pegmatite vugs. Indigenous peoples and early nineteenth-century prospectors initially explored these slopes, uncovering world-class mineral specimens as surface erosion exposed the cavities. Among the most famous finds from this district is amazonite, a striking blue-to-green variety of microcline feldspar. Its distinct coloration results from trace elements and natural geological radiation interacting within the crystal lattice over long spans of time, frequently forming stunning aesthetic contrasts alongside dark smoky quartz crystals inside the local granite pockets.

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