This locality in Brazil is famous for the epitaxial growth of rutile on hematite and how it is often locked in overgrowths of quartz crystals. The fragile golden rutile crystals form first and later the quartz encompasses them slowly over time. Here our example shows an interesting stacking on the hematite creating a lattice of the rutile along the outer edge of the quartz matrix. The back of the specimen features a spattering of "free" surface rutile and the top quartz crystals have densely rutilated zones with the golden needles. There is a glued seam on the bottom of the specimen where it apparently once needed reinforcement. Still a very nice example of what comes out of this locality.
DDJ