| 7chjdil ((WILLEMITE variety TROOSTITE)) Franklin, New Jersey, 6 x 4 x 2.5 cm, Miniature | |
 | ex Delaware County Institure of Science, Several Fluorescent Troostite crystals etched out of Calcite. The specimen is flat on the top and bottom from the original rock specimen. Then etched off the Calcite revealed the crystal faces. |
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