Yet, while carnelian beads may also be classed as etched agate and while there are no problems involved in heating the stone, its white surface grows indistinct over time.
然而，同屬鑲蝕瑪瑙，印度紅玉髓的加熱技術不難，鑲蝕上去的白色線條則會隨著年代久遠而略顯剝落黯淡。