Minerals and Fossils
A shark tooth is one of the numerous teeth of a shark. Sharks continually shed their teeth, and some Carcharhiniformes shed approximately 35,000 teeth in a lifetime. In some geological formations
Minerals and Fossils
A shark tooth is one of the numerous teeth of a shark. Sharks continually shed their teeth, and some Carcharhiniformes shed approximately 35,000 teeth in a lifetime. In some geological formations, shark’s teeth are a common fossil. These fossils can be analysed for information on shark evolution and biology, especially because the teeth are often the only part of the shark to be fossilized. In fact, fossil teeth comprise much of the fossil record of the Elasmobranchii, extending back hundreds of millions of years.
The most ancient types of sharks date back to 450 million years ago, during the Late Ordovician period, and they are mostly known from their fossilised teeth. The most commonly found fossil shark’s teeth are, however, from the Cenozoic (the last 66 million years).
Many people tend to turn to the shark teeth, believe that it helps them in adapting social situations. It is believed that the owner inherits the features of confidence. It also is believed to make the immune system stronger and promotes the restitution of cells, detoxification of the blood and also helps improve illness.
Amethyst is a well-known mineral and is a precious stone belonging to the quartz group. Amethyst belongs to the macrocrystalline branch of quartz and owes its violet/purple color to iron and aluminum impurities. Without such coloring agents, amethyst would simply be transparent, ordinary colorless quartz. Like many other varieties of macrocrystalline quartz, amethyst has a translucent to transparent clarity and a vitreous luster.
Since purple is considered to be one of the royal colors, amethyst has a historical importance as an insignia of power. Fine amethysts are featured in the British Crown Jewels and they were also a favorite of Catherine the Great and Egyptian royalty. Amethyst also holds a high place in the ranks of the Christian church and was referred to as “the stone of bishops”. The Greek word “amethystos” translates into “not drunken” and it was often worn as an amulet to protect against intoxication. Since amethyst was considered an antidote against drunkenness, many wine goblets were carved from amethyst stone. Still to this da