Crystal items refer to various objects made with crystal as the core material, covering categories such as decoration, practical use, and collection, and combining natural beauty with humanistic value. Their material sources are divided into natural crystals (such as clear quartz, amethyst, and rose quartz, which show different colors and properties due to containing trace elements) and artificial crystals (such as K9 crystal, made by artificially simulating crystal growth, with high transparency and few impurities).

Common categories include decorative items (crystal ornaments, chandeliers, beaded jewelry), practical items (crystal cups, paperweights, eyeglass lenses), and craft items (crystal carvings, inlaid artworks). The core charm of crystal items lies in their translucent and sparkling texture—they emit brilliant luster under light refraction. Some natural crystals also become collection hotspots due to their unique inclusions, ice cracks, and other textures that create rarity. Additionally, they are endowed with auspicious meanings in different cultures (such as symbolizing purity and protection), possessing both decorative functions and the value of emotional sustenance.