Coral, pearls, seashells, and ivory are animal-derived "semi-precious" jewelry as are phytogenic stones like amber, jet, and black coral.
此外，還有動物性次寶石，如珊瑚、珍珠、貝殼、象牙等；植物性次寶石類，一般常見的有琥珀、黑玉、海樹…… 等；人造珠寶及金屬飾物。