Group of laminar crystals of extraordinarily deep bluish-green color, on matrix. The specimen, that was acquired in 1956 is with a label from Peter Indergant (numb. 1817) in which the species appears as Herrengrundite, a name actually now obsolete and that refers to its previous name, from Herregrund, its locality of origin.
Špania Dolina (Herrengrund), Banská Bystrica, Banská Bystrica Region Slovak Republic (±1956)
Specimen size: 4.1 × 3.4 × 2.7 cm = 1.61” × 1.34” × 1.06”
Main crystal size: 0.3 × 0.2 cm = 0.12” × 0.08”
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