They are the shells of the fossil and present-day marine protozoan Nummulites, a type of foraminiferan.

Nummulites commonly reach 6 cm (2.4 inches) in diameter, and are common in Tertiary marine rocks, particularly around the Mediterranean (e.g. Eocene limestones from Egypt).

Item Description Item No : oa28 Stone Type : Nummulites Dimension : 28-29 mm.  thickness : 3-5 mm. Weight : 6.2g Origin : Egypt Treatment : 100% Natural All products are in  Store. You able check and shop it here.

Belemnites From Mikhailov, Ryazan, Russia

This fossil record of most cephalopods in the clade Coloidea (squid, cuttlefish, octopuses, and their relatives) is poor, especially when compared to their shelly relatives. Their hard parts, if any, are internal, can be greatly reduced in size, and often lack calcification. The extinct belemnites, however, are the exception. These squid-like animals swam with ammonoids and nautiloids in oceans of the Triassic, Jurassic, and Cretaceous Periods and are considered by paleontologists to be the ancestors of the Coleoidea. Like orthocones, belemnites had a straight shell, but it was internal, not external. It was made of three parts, a proostracum and phragmocone followed by a rostrum. Being highly resistant, the posterior bullet-shaped rostrum is most often preserved and can be found in great quantity and concentration in Mesozoic marine sediments. Before these bullet-shaped fossils were understood as fossils, early Europeans explained them as the products of lightning hitting the ground and named them “thunderbolts” or “thunderstones.”

Item Description Item No : oa14 Stone Type : Belemnites Dimension : 4 3/4″ Weight : 77.2g Origin : Mikhailov, Ryazan, Russia Treatment : 100% Natural All products are in  Store. You able check and shop it here.

Belemnites From Mikhailov, Ryazan, Russia

This fossil record of most cephalopods in the clade Coloidea (squid, cuttlefish, octopuses, and their relatives) is poor, especially when compared to their shelly relatives. Their hard parts, if any, are internal, can be greatly reduced in size, and often lack calcification. The extinct belemnites, however, are the exception. These squid-like animals swam with ammonoids and nautiloids in oceans of the Triassic, Jurassic, and Cretaceous Periods and are considered by paleontologists to be the ancestors of the Coleoidea. Like orthocones, belemnites had a straight shell, but it was internal, not external. It was made of three parts, a proostracum and phragmocone followed by a rostrum. Being highly resistant, the posterior bullet-shaped rostrum is most often preserved and can be found in great quantity and concentration in Mesozoic marine sediments. Before these bullet-shaped fossils were understood as fossils, early Europeans explained them as the products of lightning hitting the ground and named them “thunderbolts” or “thunderstones.”

Item Description Item No : oa18 Stone Type : Belemnites Dimension : 25 x 25 x 145 mm. Weight : 130.7g Origin : Mikhailov, Ryazan, Russia Treatment : 100% Natural All products are in  Store. You able check and shop it here.