[Chemical composition] The composition is relatively fixed, containing a small amount of As, Pb, Ag, Cu and Fe, and most of the elements are mechanically mixed. [crystal structure] orthorhombic system Figure L-12 Crystal structure of stibnite (quoted from Pan Zhaoyu et al., 1993) The crystal structure has a chain structure (Fig. L-12), and the chain is closely connected by S and Sb, and these chains are parallel to the c-axis. The distance between S and Sb in the chain is about 0.32 nm. The bond force is weak, so that the symmetry is shown along this direction {010}, and the crystal form extends along the direction of the chain in the structure, and is columnar parallel to the c-axis. Figure L-13 stibnite crystal (quoted from Pan Zhaoyu et al., 1993)  oblique square column: m{110}, n{210}; parallel double-sided: b010}; oblique square double cone: s{111}, p{331}, t{341} [Form] The single crystal is columnar or needle-shaped, and the cylinder has obvious longitudinal stripes (Fig. L-13). Larger crystals tend to show curvature. The aggregates are often radial or densely granulated (Figure L-14). Figure L-14 stibnite cluster [Physical properties] steel gray or gray lead, surface often blue Qiang color; black streak; crystals often with dark blue Qiang color; metallic luster; opaque. Cleavage parallel {010} complete. The cleavage plane often has a horizontal polycrystalline double crystal grain. Hardness 2. The relative density is 4.6. Crisp. [genesis and production] is mainly produced in low-temperature hydrothermal deposits, and is symbiotic with cinnabar, quartz , fluorite , barite and calcite . China's Hunan Xinhua tin mine is the world's most famous and largest source of stibnite. [Identification features] lead gray, columnar crystal form, longitudinal stripes on the cylinder surface (poly-grain), horizontal stripes on the cleavage surface (polycrystalline twin crystal). For the fine-grained block, the KOH is dropped thereon, and immediately appears yellow, and then turns into an orange-red color, thereby distinguishing it from a similar stibnite . [Main use] It is an important ore mineral of bismuth. The crystals are large or beautiful and can be highly ornamental and collectible. What is the X Banner Stand? X exhibition stand is an exhibition display item with an X banner stand on the back used for advertising purposes. What are the advantages of the X stand? The advantages of X banner stand can be summarized as concise design, convenient transportation, easy storage, simple installation, and economic practicality. It is a lightweight and fast advertising and promotional tool. The X banner is a type of advertising and promotional material for public places, events, gatherings, or business stores, as well as a display for wedding celebrations. It is small, exquisite, convenient to carry, detachable, interchangeable, and can be used repeatedly for a long time. The X banner stand adopts advertising equipment spray painting machines for spray printing production. The overall components do not need to be assembled, and are equipped with adjustable angle brackets, which are flexible and versatile, small in size, and diverse in styles. Light Weight X Banner,Lightweight X Banner,Trade Show Exhibition X Banner,Flex X Banner Stand SUZHOU JH DISPLAY&EXHIBITION EQUIPMENT CO.,LTD , https://www.jh-posterstand.com
a 0 =1.120 nm, b 0 =1.128 nm, c 0 =0.383 nm; Z=4. 
Brilliant ore (Stibnite or Antimonite)
Sb 2 S 3