Paraconularia magna

This appears to be a Paraconularia magna fossil. It was found in the Cisco group Finis Shale of Jack County Texas. It is from the Pennsylvanian Period (Virgilian). It was named by Ries in 1949.

These specimens are interesting in that they are blue. Under magnification one can see a blue like fossilized shell and more grove like detail.

Mariacrinus carleyi Crinoid Calyx

The fossil shown here is an Mariacrinus carleyi crinoid calyx found in the Waldron Shale of Davidson County, Tennessee, USA. It was found in the 1960s. Fossil dates to the Silurian Period.

Peneroplis plantus Foraminifera

This looks like a Peneroplis plantus foraminifera. It was found at Pago Beach on the island of Guam. Image is magnified 40 times under a microscope which should equate to a 1 mm field of view.

Learn more at the Foraminifera blog: http://foraminifer.blogspot.com/2010/01/peneroplis-planatus-optical-image.html

Thanks to Pam for obtaining the specimen and Herb for the processed material.

Update: I found another one and here is its picture.