Koettigite is a very RARE mineral from the famous Mina Ojuela and this showy CABINET combo specimen has at least 10 sprays of lustrous, grayish blue Koettigite associated with a centrally located, 5.5cm, water-clear selenite on botryoidal mimetite-coated gossan matrix. Koettigite is related to legrandite, of which, Mina Ojuela is renowned. From the stock of Ed Swoboda. The last major find of Koettigite at Mina Ojuela was in 1974 and remains a classic that is difficult to acquire in fine specimens.