This was the best piece in a high-grade lot of about 40 pieces I acquired, shortly after it was mined. The rare production occurred, following the drought in Mexico (fall of '08) that lowered the water level in the Ojuela Mine below the Adamite level for the first time in about 20 years. I love this piece as it shows saturated, green color in a primary, large crystal. This main crystal has an unusual four sided form, that you don't see in the ordinary variety of Adamite. There is a sharp contrast between the glassy green, copper rich adamites and the brown Limonite matix. The primary crystal is 1.8 x 1.3 cms. An unusual and hard to find specimen.