|Figure 1. A stubby, pyramidal amethyst crystal from a gold mine in Cripple Creek. |
Specimen is from the Steven Veatch collection.Photo © by Steven Marquez.
|Figure 2. Note the faint crosswise striations on the surface of the amethyst crystal. |
This is one of the diagnostic features of quartz. Specimen is from the Steven Veatch collection.
Photo © by Steven Marquez.