Pleonaste — specimen 0463, photo © NMNHS
Pleonaste — specimen 0463
Thailand, Kanchanaburi, Bo Phloi
Weight: 1.41 ct; size: 7.60 | 6.44 | 4.59 mm; shape: oval; colour: black; clarity: opaque; cut: excellent; treatment: none.
Clean specimen; design ‘Ovalimixtum ST’, excellent cut by Tan Pen.
More information from ‘Classification’
An intermediate variety of the hercynite-spinel series, iron-rich spinel or magnesium-rich hercynite. Often called black spinel.