(1) 蛋白石项链。蛋白石的硬度较低，因此应避免与其他物体摩擦。蛋白石含有水分，因此应避免高温。否则，如果水分因蒸发而流失，透明度将会丧失，如果水分流失，它将会爆炸。此外，蛋白石不耐酸，因此在佩戴蛋白石珠宝时应避免高温和酸性物质。在收集蛋白石珠宝时，还应注意环境不应过于干燥，否则也会导致脱水和裂纹，甚至出现裂缝。为了防止脱水，蛋白石珠宝应在干燥季节每隔一定时间浸泡在清水中。.
(2) 紫水晶项链。紫水晶的颜色不稳定，在高温或长时间暴露的情况下会褪色。佩戴或存放时应避免高温或阳光直射。.
(3) 青金石项链。青金石项链沾污后，不能用水浸泡和清洗。因为青金石是由多种矿物组成的颗粒状聚集体，如果用水浸泡和清洗，宝石表面的污垢会渗入内部，从而改变青金石的原始光泽。青金石珠宝沾污后，应轻轻用湿布擦拭以去除污垢。.
(4) 玉石项链。虽然翡翠坚硬且韧性好，但具有一定的抗冲击性。然而，经过加工的翡翠产品通常较薄，容易受到冲击损坏。.
(5) 孟加拉绿松石和绿松石项链。这两种宝石的硬度高于水，非常容易磨损。这两者的化学性质不稳定，会在酸中被腐蚀和溶解。绿松石在高温下容易变色，即使长时间暴露在阳光下和浸泡在汗水中，绿松石也会变色。这些在佩戴和收藏时必须注意。.
(6) 祖母绿项链。祖母绿的硬度略高于翡翠，但比翡翠更脆，因此不能承受冲击和撞击。此外，祖母绿怕高温，遇火时颜色会褪色，因此在高温下容易开裂。.
(7) Pearl and coral necklaces. The hardness of pearls and corals is very low, and the surface is easy to lose luster due to friction. Both are calcium carbonate, which will be corroded and dissolved in case of acid. It is easy to sweat in summer, and sweat will also damage the surface of pearls and corals and lose their original luster. Powders, perfume and hair creams in cosmetics will also gradually fade pearls. Therefore, it is better not to wear such jewelry in summer. If it is stained by sweat, it can be rinsed in clean water and then lightly wiped with soft fabric. Pearl jewelry must be rinsed with clean water before collection, and the storage place must also avoid cosmetics.
