Pearl is a kind of ancient organic gem, which is mainly produced in the mollusk of pearl shell and pearl mother shell. The mineral beads containing calcium carbonate (aragonite) formed by endocrine action are composed of a large number of tiny aragonite crystals.Rich in variety, shapes and colors; According to qualitative and archaeological studies, pearls existed on earth 200 million years ago.In the international gem world, pearls are also listed as a lucky stone for the birthday of June, as well as the commemorative stone for the 13th and 30th wedding anniversari
Red Coral: It is an organic gemstone. It has a pleasing color and a shiny texture. It grows in deep seas 100 to 2000 meters away from humans. It is listed as three major organic gemstones with pearl and amber. It is also listed as one of the seven treasures in the Oriental Buddhist scriptures. It has been regarded as a rich and auspicious thing since ancient times. Natural red corals are formed by the accumulation of coral insects. They grow very slowly and are non-renewable. However, red corals only grow in a few straits (Taiwan Strait, Japan Strait, Baltic
Garnet, a term used in geology, one of the major rock-forming minerals in the upper mantle. The shape and color of garnet crystals and pomegranate seeds are very similar, hence the name "garnet". A garnet with a high degree of clarity can be a gemstone. The English name for garnet is Garnet, which evolved from the Latin word "Granatum" and means "like a seed." The common garnet is red, but its color is very broad and covers almost the entire spectrum. Basic nature Garnet, known in ancient China as the purple crow or the sylvestris, is a group of minerals
Rock crystal is a rare mineral, a kind of gemstone, quartz crystal, belonging to the quartz family in mineralogy. The main chemical component is silica, and the chemical formula is SiO2. Forms colorless and transparent crystals when pure. When it contains trace elements such as Al, Fe, etc., it is pink, purple, yellow, brown, and the like. Different types of color centers are formed by irradiating trace elements to produce different colors such as purple, yellow, brown, pink, and the like. The inclusion of inclusion minerals is called inclusion crystal, such as h
Aquamarine (aquamarine, name from Latin: aqua marine, originally intended for seawater), also known as seawater sapphire, is a silicate ore that is a type of beryl. It is a transparent gemstone with blue or navy blue. Aquamarine is a kind of silicate containing bismuth and aluminum. It is collectively called colored gems with emeralds, eucalyptus and tourmalines. The color of aquamarine is sky blue to sea blue or greenish blue. Its color is mainly due to the trace amount of ferrous ions (Fe2+), which is bright and clean, and bright blue to pale blue. optimal. T
Chemical properties Each carbon atom in the crystal forms a covalent bond with the other four adjacent carbon atoms in the sp3 hybrid orbital, and each four adjacent carbon atoms constitute a regular tetrahedron. The crystal type is a diamond structure, so the unsharp crystal shape is often a regular octahedron. The C-C bond in diamond is very strong. All valence electrons participate in the formation of covalent bonds. There is no free electron, so the hardness of diamond is very large, non-conductive, and the melting point is 3815 °C. The diamond has a flam
Emerald is known as the king of emeralds, as rare as the bright red Ulan, and one of the four precious stones (red, blue, emerald and diamond) recognized by the international jewellery industry. Because of its unique green and unique charm, as well as magical legends, it is favored by Westerners. Emerald symbolizes kindness, faith, kindness, eternity, luck, and happiness. Wearing it will bring peace to life. It is also a memorial stone for the 55th anniversary of marriage. Emerald is a very old gem that has been used as jewelry in ancient Egypt. Introduction Eme
Pearl is a kind of ancient organic gem, which is mainly produced in the mollusk of pearl shell and pearl mother shell. The mineral beads containing calcium carbonate (aragonite) formed by endocrine action are composed of a large number of tiny aragonite crystals. Rich in variety, shapes and colors;According to qualitative and archaeological studies, pearls existed on earth 200 million years ago. In the international gem world, pearls are also listed as a lucky stone for the birthday of June, as well as the commemorative stone for the 13th and 30th wedding anniversa
Ruby is a red corundum. It is a corundum whose main component is alumina (Al2 O3). Red comes from chromium (Cr), mainly Cr2O3, and the content is generally 0.1 to 3%, and the highest is 4%. It contains Ti and is called blue sapphire. Most natural rubies come from Asia (Myanmar, Thailand, Sri Lanka, China, Xinjiang, China, Yunnan, etc.), Africa, Oceania (Australia) and the Americas (Montana and South Carolina, USA). Natural rubies are rare and therefore precious, but synthetic rubies are not too difficult, so industrial rubies are synthetic. In 1999, a red and b
Spinel is a mineral composed of magnesium aluminum oxide. Because it contains magnesium, iron, zinc, manganese and other elements, they can be divided into many kinds, such as aluminum spinel, iron spinel, zinc spinel, manganese tip. Spar, chrome spinel, etc. Due to the different elements, different spinels can have different colors, such as magnesium spinel between red, blue, green, brown or colorless; zinc spinel is dark green; iron spinel is Black and so on. Spinels are hard, glassy octahedrons or granules and blocks. They appear in igneous rocks, granitic pegmatit