All our grommets and washers are manufactured from the best raw materials. We carefully choose the best brass to sustain our quality standards. Our brass-made grommets can be used safely outdoors.Zonglan continues to be respected as an innovative eyelet machine designer, brass eyelet manufacturer and exporter.
Zonglan maintains its leading position in the market by achieving extremely short lead times, thanks to its vast supply of off-the-shelf products. We are proud of our advanced supply chain management system, which allows us to make fast shipments. In last 5 years, our shipment lead time has been an average of less than 5 days. Eyelets and Grommets,Grommet Machines,Self Piercing Banner Eyelets,Self Piercing Eyelets NINGBO ZONGLAN MECHANICAL AND ELECTRICAL EQUIPMENT MANUFACTURE CO., LTD , https://www.zonglaneyelet.com
Thanks to our strict quality assurance system, we take pride in having a reputation for consistent product and service quality that does not compromise our competitive pricing strategy. As a result of our decades-long and never-ending efforts to supply [problem-free" products, we are proud to carry a brand name that has become a symbol of reliability in our industry.
Emerald good and bad evaluation starts from four aspects
When purchasing jade, the first concern for most people is whether it's genuine or not. Beyond authenticity, the quality of the jade is another critical factor to consider. Typically, jade quality is evaluated based on four main aspects: color, texture, transparency, and inclusions.
The color of jade, often referred to as "color," is specifically about the green hue. High-quality jade has a vibrant, rich, and pure green tone. The term "yang" refers to brightness and clarity, where the green appears lively with a subtle yellow undertone. "Thick" means the color is full and dense without being overly intense. "Positive" indicates purity, with no bluish tinge in the green. Lastly, the color should be even and soft, complementing the jade’s texture and transparency, giving it a natural, refined appearance.
The texture of jade, also known as the "ground," refers to the overall smoothness and clarity of the stone. A high-quality jade has a clean, glass-like surface—often called "glass ground." If the texture is rough or mottled, it may be described as "lime ground." When the green color blends with other elements, such as a slight yellowish tint, it can significantly increase the value of the piece.
Transparency, or "water," refers to how clear and see-through the jade is. Good water means the jade is transparent and allows light to pass through, making it more valuable and visually appealing.
Inclusions in jade refer to natural imperfections like cracks, cloudiness, or dark spots that form during the stone's creation. These are common and do not always detract from the value, especially if they are not visible on the main surface. In fact, some inclusions can even serve as indicators of authenticity. When evaluating jade, the most important factor is the quality of the color. Accurately identifying the green shade holds special significance in determining its value.
There are four types of high-quality jadeite: emerald green, green, apple green, and jade green. Consumers can easily distinguish between them by observing the depth and tone of the green. Some may have a slight yellowish tint, but this is usually minimal and only affects the shade slightly. Understanding these differences helps buyers make informed decisions when selecting jade.