Fossil - Ammonite (Pleuroceras spinatum) S size

Fossil - Ammonite (Pleuroceras spinatum) , size S

A magnificent species of ammonite (Pleuroceras spinatum) lived in the Early Jurassic period, approximately 189.6-183.0 million years ago. Ammonites of the genus Pleuroceras were fast-moving, nektonic carnivores. The fossil is covered in a magnificent layer of pyrite. Ammonites (Ammonoidea) were ancient marine animals belonging to the phylum Mollusca and the class Cephalopods, which resembled modern nautiloids in appearance , but were more closely related to octopuses (Coleoidea). Ammonites appeared about 400 million years ago, at the turn of the Silurian and Devonian periods, and became extinct in the mass extinction at the end of the Cretaceous period 65 million years ago. In good condition. Age-related wear and small hairline cracks. Dirt and dust. Size 52mm x 65mm x 22mm. Weight approx. 112g .

Symbol meaning

The scientific name of ammonites refers to their flat spiral-shaped fossilized calcareous shell, somewhat resembling a ram's horn. Gaius Plinius Secundus (23 BC – autumn 79 AD), better known as Pliny the Elder, called the fossils of these ancient animals "hammonis cornu" ("horns of Ammon"), referring to the Egyptian sun god, Amon (Ammon), whose sacred animal rams were known to be. The scientific names of several ammonite species end in the term -ceras, which is Greek for horn (κέρας).

The golden ratio was first studied by ancient Greek mathematicians after they noticed that the ratio occurs in many geometric shapes. It plays an important role not only in mathematics but also in aesthetics, architecture, art, nature and music. Shapes that contain the golden ratio are generally perceived as aesthetically pleasing. One of the most important features of ammonites is their spiral-like shape. The golden ratio is also closely related to the Fibonacci sequence, in which each number is the sum of the two previous numbers. In his work (Liber Abaci) published in 1202, Fibonacci presents his famous sequence. In it, the ratio of two consecutive numbers is closer to the golden ratio the further you go in the sequence, i.e. the limiting value of this ratio is the same as the ratio of the golden ratio. The shape of ammonites has been said to closely resemble the Fibonacci spiral, which is drawn based on the Fibonacci sequence. Ammonites have also been seen to depict a snake on a ball. An ancient legend tells that Saint Hilda of Whitby (c. 614 – 680), used to turn snakes slithering on the shores into stones (i.e. ammonites) through the power of prayer. They were carved with the head of a snake and the sacred amulet was believed to protect its wearer from snakebites, blindness and other ailments. Ammonites, like other fossils, are a tangible reminder of the importance of transitional processes, transformation and personal growth, helping you to understand the mystery of life and the determination of time.

Ritual use

Ammonites have been used throughout history as protective amulets. Pliny the Elder believed that ammonites could bring good luck if placed under the head of a sleeping person. On an altar or as a portable amulet, these ancient fossils can help you move from the old to the new, from the past to the future.

Note: Ammonites that are millions of years old are fragile. Fossils are natural products, and Each one is unique, no two are alike. As a result, colors, shapes, and brightness may vary. Condition ranges from fair to good and they show wear, fractures, and small chips typical of fossils.