Here is a very nice Megalodon tooth with a size of about 87 mm, so roughly 3.5 inches.

This Megalodon tooth is a beautiful specimen measuring 70 mm, which is approximately 2.5 inches.

This Megalodon tooth is a beautiful specimen with a size of 78 mm. This is about 3 inches.

Here is a fossil Megalodon tooth measuring approximately 137 mm, featuring a well-preserved root and an attractive light coloration. For comparison, the length is slightly over 5 inches.

Here is a fossil Megalodon tooth measuring approximately 137 mm, featuring a well-preserved root and an attractive light coloration. For comparison, the length is slightly over 5 inches.

This is a Megalodon tooth measuring about 106 mm, which corresponds to roughly 4 inches.

This Megalodon tooth is a beautiful specimen measuring about 60 mm, which is just under 2.5 inches.

Here is a small Megalodon tooth measuring about 60 mm, which is a little more than 2 inches.

This is a beautiful, light colored Megalodon tooth with a length of approximately 81 mm, which is roughly 3 inches.

Here is a Megalodon tooth measuring approximately 65 mm, which is about 2.5  inches in size.
 

Here is a fossil Megalodon tooth measuring approximately 137 mm, featuring a well-preserved root and an attractive light coloration. For comparison, the length is slightly over 5 inches.

This is a fossil Megalodon tooth measuring approximately 104  mm, featuring a well-preserved root. For comparison, the length is about 3.5 inches.

Here is a Utah trilobite of the species Elrathia kingi from the Wheeler Shale.

This Utah Trilobite is a large and detailed specimen of the species Elrathia kingi 
The Trilobite itself is about 43 mm long.

This is a trilobite of genus Kingaspis from the Jebel Wawrmast Formation of Morocco.

Here is a trilobite of the relatively rare species Kymataspis arenosa from the Jebel Wawrmast Formation of Morocco. 

This is a double specimen featuring two trilobites of the genus Kingaspis from the Jebel Wawrmast Formation. 

This is an affordable specimen of the Moroccan trilobite Hamatolenus vincenti from the Jbel Wawrmast Formation. 

Here is an authentic specimen of a Morocco trilobite of the genus Kingaspis from the Middle Cambrian of Jebel Ougnate.
 

Here is a nice and inexpensive Hamatolenus vincenti from the Jbel Wawrmast fm..
The typical macro pleural segment is well visible

This Utah trilobite is a detailed specimen of the species Elrathia kingi from the Wheeler Shale.
 

This is a decorative and typical Dactylioceras athleticum plate from the classic site of Schlaifhausen.

This  is a classic ammonite on Matrix of the species Dactylioceras athleticum from the Schlaifhausen site.

Here is a classic ammonite of the species Dactylioceras athleticum from the Schlaifhausen site.