smoky quartz crystal cluster - teaching specimen from Novo Horizonte, Bahia, Brazil but the glass remained to

but the glass remained to become part of the sand

complete with charger

The vegetation was gradually compressed to form peat

Tremolite is most often found in metamorphosed dolomitic limestones

smoky quartz crystal cluster - teaching specimen from Novo Horizonte, Bahia, Brazil but the glass remained toTeaching smoky quartz cluster from Municpio Novo Horizonte, Bahia, Brazil. This area is famous for smoky quartz, often with rutile inclusions in the crystals. Smoky quartz forms from natural gamma radiation released by surrounding rocks. The radiation causes aluminum atoms, which replace silicon atoms in the crystal lattice, to transfer an electron to a neighboring positively charged ion, often Li+, forming an aluminum metal color center that darkens