Fluorescent Minerals
Fluorescent calcite from Williamson County, TX. The bands fluoresce creamy yellow and white (appears more blue in the photos) under short, mid and longwave light.
These fist-sized rocks came from massive boulders unearthed by heavy machinery while clearing a new roadbed. When cracked open with a sledgehammer, the grimy limestone exterior gave way to the beautiful crystalline banding within.
The fluorescent calcite is also highly phosphorescent.
The banded crystals are even more clear in this piece.
Rockhounding, Texas-style:
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