Quartz crystals are among the most wide-spread of crystal forms, especially the hexagonal prism terminated by the two rhombohedral forms r and z. However, quartz crystals consisting dominantly of but oneof the rhombohedral forms are rare and known from relatively few localities. This paper describes a new locality, near Artesia, New Mexico, where rhombohedral quartz crystals of large size are to be found. These crystals closely simulate cubes. They occur with other crystals of more common habit, and here, and in numerous other localities in southeastern New Mexico, where the common quartz crystals occur, they are known as “Pecos diamonds.”

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not currently have access to this article.