Job in the Bible said: "Only the value of wisdom exceeds ruby"; in some ancient Indian works, ruby ​​is called "the most precious of the twelve precious stones created by God when he created everything." According to legend, people who wear rubies will “healthy and longevity, get rich and get rich, and love will be happy.†“If you wear a ruby ​​ring on your left hand or a ruby ​​chest on the left, you will have a temperament. Change the enemy to be the magic of friends." Ruby quality evaluation: 1. Color: Because it is a colored gemstone, color is the most important factor in its quality evaluation. The classification scheme is as follows: blood red, pigeon blood red (optimal) > bright red (excellent) > pure red (good) > pink (middle) > purple red (poor). 2. Quality: The greater the quality, the better. The overall quality is better than 2 carats for the top grade, more than 5 carats generally need to be discussed separately; in terms of the minimum quality requirements available, the general quality requirements are greater than 0.6 carats, and the quality can be relaxed to 0.3 carats. 3. Transparency: The more transparent, the better. Opaque people generally have no use value unless they exhibit a special star effect. 4. Clarity: divided by the benign oriented inclusions that produce the star color effect, the other bad inclusions and the cracks and cracks are as small as possible. 5. Cut: Those with high transparency should be cut into facets, and those with low transparency but star effect should be cut into curved faces. 6. Special optical effects. Office curtains have the characteristics of relatively convenient installation, simple style, generous and concise, and good masking ability. The advantages of office curtain are rich variety, moderate price, good masking ability, part of the curtain is made of new materials, and clean water is easy to scrub. The rolling curtain can be separated by pulling bead curtain and spring positioning curtain. Ultra-thin, sunshade, thickening and other different specifications. It is mainly divided into two categories: full shading and semi-shading (also known as sun curtain). Curtain Fabric For Offices,Vertical modern classic curtains,Glossy taffeta curtains,Cotton Linen Curtain Fabric Shaoxing Angcan Import & Export Co., Ltd. , https://www.all-can.com.cn