The product is a 0.98-carat natural yellow sphene gemstone originating from Russia. This gemstone has a unique rainbow sparkling luster under sunlight due to its opalescence and asterism effects. With an oval shape and a total carat weight of 0.98, this gemstone is perfect for jewelry making. Its natural creation, hardness of 5-5.5, and clarity grade of I1-I2 make it a valuable addition to any gemstone collection.