Chromite is a mineral formed by magmatic processes, often occurring in ultrabasic rocks and coexisting with olivine; Also found in sand mines. It looks very similar to magnetite in appearance, usually in the form of block or granular aggregates. In the metallurgical industry, chromite is mainly used to produce ferrochrome alloys and metallic chromium. Chromium iron alloy is used as an additive to produce various high-strength, corrosion-resistant, wear-resistant, high-temperature resistant, and oxidation resistant special steels. Chromium metal is mainly used for smelting special alloys with elements such as cobalt, nickel, and tungsten. Chromite is a scarce mineral with limited reserves and low production. In industry, similar minerals such as chromite, chromite spinel, rich chromite spinel, and hard chromite spinel are often collectively referred to as chromite.

Chlorargyrite, with a chemical composition of AgCl and a molecular weight of 143.32. The production environment is in a partially oxidized silver deposit, with colors of purple gray, green, white, and colorless. Chlorite can be used as a mineral raw material for extracting silver.

A non-metallic mineral primarily composed of arsenic sulfide. Arsenic has three allotropes: yellow, gray, and black brown. Its gray crystals are metallic, brittle, and hard. The main minerals are realgar, orpiment, and arsenopyrite; Arsenic is the main component, with a cut-off grade of 5% for the former and 3-5% for the latter; The industrial grade is 10% for the former and 5% to 6% for the latter. There are also arsenic nickel ore, arsenic antimony ore, arsenic pyroxene, orthorhombic arsenic iron ore, etc. Generally, underground mining method is used for mining, and flotation method is used for beneficiation.

The chemical composition is Ag2S, containing 87.1% Ag. Isometric. The crystal is cubic or octahedral, usually in the form of dense blocks. The color and stripes are both lead gray. The fresh fracture surface has a metallic luster. Mohs hardness is 2-2.5. Density 7.2-7.4. Has weak extensibility. It is a mineral of hydrothermal origin, formed above 173 ℃. Below this temperature, it transforms into spiral shaped sulfide silver with the same composition. It is a mineral raw material for silver smelting, but the main source of silver is obtained as a by-product from copper lead zinc ores.

Wenshi is a carbonate mineral. The component is CaCO3. Also known as aragonite, it is homogeneous and resembles calcite and other minerals. The rhombohedral system is characterized by columnar or lance shaped crystals, commonly exhibiting pseudo hexagonal symmetry in three connected crystals. Collectives are often in the form of shells, concretions, beans, spherical particles, etc. Usually white or yellow white in color. Glass gloss, with a grease gloss on the fracture surface. Incomplete cleavage of the board surface. Shell shaped fracture. Mohs hardness is 3.5-4.5. The specific gravity is between 2.9 and 3.0. In nature, aragonite is unstable and often transforms into calcite. Mainly formed under exogenous conditions, occurring in modern seabed sediments or clay; In limestone caves.