Opal is an opal in mineralogy, a gemstone with a color-changing effect, and an aqueous amorphous silica. The chemical composition is SiO2·nH2O, and the water content is generally 3%-10%. Amorphous body. The interior has a spheroidal structure, and the aggregates are mostly grape-shaped and stalactite-like. The background color is black, milky white, light yellow, orange and so on. Translucent to slightly transparent. Glass luster, pearl luster, protein luster. With a color change effect. The refractive index is 1.37-1.47, no birefringence, and the dispersion is very weak. The hardness is 5.5-6.5 and the density is 2.15-2.23 g/cm3. Sexually brittle, easy to dry, shell-like fracture. Different types of opal emit different colors of fluorescence under long-wave ultraviolet radiation. Opal, the appearance is bright and splendid, and its beautiful and charming color is amazing. It has a flame ruby, emerald and purple bright purple crystal emerald green, ruby set of bright, amethyst and emerald charming luxury in one. In Europe, Opal is a lucky representative. The ancient Romans called it the son of "Cupid". It is a beautiful angel in love and is considered a symbol of hope and purity. According to Pliny, the Norni veteran was rather exiled, and he was not willing to give his opal to Anthony (the ancient Roman leader of 83-30 BC) who longed for this gem. The Orientals regard it as a sacred gem that symbolizes loyalty. Most Americans like red and orange opal. Japanese people generally love blue and green opal. The Chinese people are fond of the festive red tones of warm colors. The international gemstone industry listed Opal as the "October Birthstone", a stone of hope and happiness. Smithsonian College of the United States treasures the world's largest precious opal, weighing 355.19 carats. Idomuk Opal weighed 205 carats. In 1954, the Australian government put it on a necklace and gave it to the Queen of England.
CTK-KC600
1. Grooving on HSS Saw Blade teeth can improve Saw Blade cutting ability, reduce tube end burs, extend life time and decrease cutting cost.
2. The machine can make groove on teeth in one circle.
3. The machine working parts move right and left, up and down pneumatically. The groove depth is adjusted mechanically.
4. Super speed spindle(RPM20000-30000) makes the machine be able to groove on HSS saw blade and tungsten carbide saw blade.
Saw Blade Slotting Machine,Grinder To Circular Saw,Circular Saw For Grinder,Pneumatical Saw Blade Slotting Machine GUANGDONG CHITTAK INTELLIGENT EQUIPMENT CO.,LTD , https://www.chittakcutting.com
Opal's English name is pal, which is derived from the Latin Opalus, meaning "the beauty of the gemstone ", or from the Sanskrit Upala, meaning "precious gem". The word "Opo" in China is based on English transliteration.