Black tourmaline Blue aragonite there are fine parallel lines

there are fine parallel lines similar to what you see with 3D printing

I have a hard time passing up isopod morphs with mineral names

Locale: High Atlas Mountains

The crystal habit is actually 'pseudo-hexagonal' meaning the crystals that appear hexagonal are actually formed of multiple intergrown crystals (crystal 'twinning')

some with a slight smoky-quartz tint

Black tourmaline Blue aragonite there are fine parallel linesLocale: Erongo Mountain, Namibia Approx dimensions: 3 x 2. 5 x 2. 5" Approx weight: 287g ** Loose piece on base This statuesque piece of black tourmaline, known as schorl, has the mercedes termination and glossy high luster characteristic of the Erongo region. The piece is effectively three intergrown crystals in a stepped formation, with partial crystals attached at one end. The sides are beautifully striated on the partial crystals, with more