1. Decorative effect: the sword-shaped stone decorated on the back of the sofa can increase the three-dimensional sense and layering of the space, and the cool tone of the stone can also bring noble and elegant atmosphere to the whole space.

2. Practical function: The sword-shaped stone has certain directionality and guidance, which can visually guide people's sight and sense of space and make the whole space more layered and dynamic. The firmness and wear resistance of stone also have certain practical value.

3. Cultural connotation: Sword-shaped stone has certain symbolic significance in China traditional culture, representing samurai spirit, chivalrous demeanor, justice and courage. In modern home decoration, sword-shaped stone as a decorative element can not only reflect the owner's cultural heritage and taste, but also bring a sense of culture and history to the whole space.