- Thumbnail, 1.7 x 0.6 x 0.2 cm
- Ojuela Mine, Mapimi, Mun. de Mapimi, Durango, Mexico
Koettigite is a very rare mineral from the Mina Ojuela and this a fine thumbnail specimen of platy, lustrous, grayish-blue Koettigite. Koettigite is related to legrandite, of which, Mina Ojuela is renowned. This is a pristine, floater crystal, although the ends and part of one side are contacted. Highly representative of the rare species and famous locale.