There are many different types of precious stones in the world, but each one is unique in its own way. Precious stones are very valuable due to their construction and rarity, and not just because of the beauty.
There are more than 4000 natural minerals known to the world. These minerals are produced by cooling the magma or melted stone, which is what makes them more interesting.
When groups of minerals are formed, they can develop into valuable natural resources such as gold, iron, marble, granite. Many minerals form beautiful crystals, and the most sought after are jewels.
Although the chamomile looks untidy, after the form is determined and polished, they show the beauty and attractiveness that captivates their appearance.
What is a precious stone?
From the historical point of view there are two categories: precious and semi-precious stones.
– Precious are: diamonds, rubies, sapphire and emeralds, and all other jewels are considered semi-precious stones. This status is determined by supply and demand as well as certain quantities that exist on the ground.
– Diamond –
Diamond is the toughest natural substance on Earth. They form from carbon atoms that have experienced extremely high pressure, hundreds of kilometers underground. They can only be found in several locations around the world. It has the highest hardness and thermal conductivity of any material. Due to this feature, it is applied in the industry for cutting and polishing tools and scientific applications in diamond knives and diamond anvil cells.
The colors of the diamond can be: green, yellow, blue, brown, purple, red, pink or orange. Diamond also has a relatively high dispersion of brightness of different colors. The most expensive diamond “Openhajmer Blu” was sold for $ 51.3 million and thus set the world’s new diamond record sold at auction.
Most natural diamonds are between 1 and 3.5 billion years old and most are formed at depths of 150 to 250 kilometers in the Earth’s ceiling, although some came from a depth of 800 kilometers. Under high pressure and temperature, carbon-containing liquids dissolve minerals and replace them with diamonds.
There are natural, synthetic and imitation diamonds and are most often distinguished by using optical techniques or measuring thermal conductivity.
– Ruby –
The word ruby comes from Latin and means “red”. Rubin is a red precious stone, and its color varies from pink to red, the color of blood due to the elements of chromium. This shade is also the most valuable in comparison to other rubies of similar quality. Natural rubies are extremely rare.
The ruby quality is determined by its color, cut and clarity, which together with the weight of the cards influence its value. One of the most expensive rubies in the world called Sunrise Ruby was sold at auction for $ 30 million.
It is very difficult to say where the first rubies were found. They are mentioned in the Bible and were the central means of trade during the medieval period of history. Their cultural significance is great, even though all stones called rubies may not have had a chemical composition that we would now describe as a real rubin.
Sapphire is a blue gemstone, and the name also comes from the Latin word. It is a varied mineral corundum, which consists of aluminum oxide. Usually blue colors or natural sapphires can also be yellow, green, violet and orange. Sapphire can not only be red in color, because as a red colored corundum it is called ruby. The ruby also varies between rubies and sapphires, depending on the locality.
Natural stones are sapphire shavings and polishes and as such are made for jewelry.
Like diamonds and sapphires can be created synthetically in laboratories for industrial or decorative purposes in large crystalline walls. Due to the extraordinary hardness, it was rated 9 on the Mohs scale, as the third most severe mineral.
In addition to jewelry, due to its exceptional hard-arrayed in the manufacture of crystal watches, high-end windows, moving beds …
It is interesting that this stone has set the world record for the highest price paid for the sapphire auction and it is an incredible $ 17,305,996.
– Emerald –
Emerald is a stone that appears in many shades of green and blue. It is highly appreciated and by weight is considered the most valuable precious stone.
There is a wide spectrum of clarity, which depends on the inclusions and splits of crystals.
Most emeralds get caught in order to improve clarity. Cedar oil is often used for this purpose because it has a similar refractive index. The highest price reaches clear stones with a dark but lively color.
The most expensive emerald ever sold for $ 6.5 Million as part of the Elizabeth Tailor collection that appeared in December 2011 and created a great excitement in the world of luxury jewelry.
In the trade of precious stones, it is not accepted to eat green oil. A rare type of emerald called trapish is located in Colombia. Colombian emeralds are the most prized for clarity. Because of its rarity and the value of emeralds, it is also synthetically produced by the hydrothermal process.
Did you know that an amethyst was once a precious gem?
Indeed, until large reserves were found in Brazil, amethysts were considered very valuable and valuable. When these reserves were discovered, the value of amethyst dropped significantly.