1, diamond
As the hardest natural substance, diamond is naturally the first precious high-grade gem. Diamonds have been regarded as a symbol of strength since ancient times, and there are even more Greek myths that diamonds are the tears of the gods.
2. Emerald
Known as the king of jade, it is jadeite among jade. Its chemical composition is sodium aluminosilicate, and its mineral composition is pyroxene, mainly jadeite. Its structure is a dense and massive aggregate composed of countless fine fibrous microcrystals, which has a blanket structure. Very tough, able to withstand high impact and pressure, and its products are durable.
Step 3: pearls
Pearl is an ancient organic gem, which is mainly produced in mollusks such as Pinctada and Pinctada. Pearl is a mineral bead containing calcium carbonate produced by the endocrine function of shellfish, which is composed of a large number of tiny aragonite crystals. Rich in variety, different in shape and colorful.
4.agate
Agate, also known as agate, Kate Ma and agate, is a kind of chalcedony mineral. It is usually a banded rock block mixed with opal and aphanitic. Its hardness is 6.5-7 degrees, its specific gravity is 2.65, and its color is quite layered. Translucent or opaque. The primitive form of tripartite crystal system. It is often dense and massive to form various structures, such as breast, grape and tuberculosis.
5. Zircon
Zircon, also known as zircon, is called "hyacinth stone" in Japan. It is the birthstone of December, symbolizing success. It is a silicate mineral with the chemical formula ZrSiO? . It is the main ore for refining zirconium metal, and contains impurities such as Hf, Th, U and TR. Zircon widely exists in acidic igneous rocks, metamorphic rocks and other sediments.