The setting used in Opal Jewelry creation is very important for maintaining the delicate gemstone's beauty as well as its preservation. The cabochon setting is the most popular option for Opal Gemstone Jewelry among the many setting alternatives. In this investigation, we examine why the unique qualities of opals are ideally complemented by the cabochon setting. Opals are known for having a composition that is quite delicate and fragile. Compared to harder gemstones like diamonds, they are more prone to scratches and cracks, scoring between 5.5 and 6.5 on the Mohs toughness scale.