Description: Muscovite ps. after tourmaline
Sapo Mine, Conselheiro Pena, Minas Gerais, Brazil
5.3 x 6.6 cm.
Intergrown books of silvery muscovite crystals replacing a tourmaline crystal. The trigonal tourmaline x-section is distinctly visible when viewed from the top. Collected in 2010.
All pictures, text, design © Forum FMF 2006-2024