This tourmaline specimen features both green crystals and watermelon crystals on a cookeite matrix. Most of the crystals are terminated, with flat-topped pinacoid tips that are shiny and complete. The watermelon tourmalines have transparent, light green outer surfaces with pinkish red interiors that are easily visible through the see-through faces of the crystals. This is an excellent matrix specimen of this highly prized for of tourmaline. I acquired this piece in Ouro Preto on my 2016 trip to Brazil.In 2016 I was topped on the street in Ouro Preto by a local with a packet of tourmaline crystals he wanted to sell me. This was one of the piece in this lot. The matrix on this specimen is embedded with a dozen or so gemmy tourmaline crystals, in shades of red, green and clear. They stand up and out nicely, and there is a dusting of yellow-tan cookeite on one side, as well.