There are layers of horizontal Limonite "stacked," on itself, with yellow Adamite crystals "inhabiting," the space between each layer. Some are exending out, while most are tucked away inside. There are layers of micro-adamites forming a druzy layer on some layers of Limonite. What's also cool is this piece fluoresces like mad, turning a neon green under long wave ultraviolet light. This piece was mined in the autumn of 2008, when a prolonged drought made the water level within the Ojuela mine drop to expose the Adamite level. These levels had faced flooding since the late 1970's. Since then, these same levels have not been reached and production has been virtually nil. There is a partial Adamite crystal in the middle of the piece, and one ofn the far side (let's say 32 intact and two partials). Quite interesting for its layered characteristics.