In order to determine if a black stone is good or bad, one can consider several factors. First, its luster and smoothness can be examined. True black stones, even with good polishing, will not have a mirror-like finish, while fake ones will have a very smooth surface with strong reflections. Second, looking for sand eyes and bubble eyes can also help identify the authenticity of the black stone. Black stones are known to have sand eyes and gas bubbles, while fake ones often have glass or plastic material and will have visible bubbles on the back. Thirdly, examining the texture can provide further clues. Natural black stones will have irregular layers or patterns, such as year lines or color alternating patterns, while fake ones will have no visible texture and only the marks left by the mold.
There are several types of black stones, including black pebbles, basalt, coal, imitation jade, and ink rock. Each type has its own unique characteristics and uses.Black pebbles, which are found in China, are known for their smooth and glossy surfaces, and some varieties even have a black shine. They are highly valued in jewelry making and are often used as decorative items.Coal is a type of mineral that is formed from the remains of ancient plants and animals. It is often used as fuel and is also used in the production of steel and other metals. Coal is black and has a high carbon content, which makes it burn hot and long-lasting.Imitation jade, also known as black jade, is a type of man-made stone that is often used in imitation of the natural stone. It is made from a mixture of glass and other materials and is often dyed to achieve a black color. Imitation jade is not as valuable as natural black jade and is often used in lower-end jewelry items.Ink rock, also known as inkstone, is a type of stone that is used for making ink. It is formed from the fossilized shells of trees and is known for its dark, fine-grained texture. Ink rock is highly prized by collectors and is often used in the production of high-quality inks.In terms of divination, it is believed that certain black stones have special powers. For example, black tourmaline is said to promote physical and mental well-being, while black agate is believed to protect against negative energies. However, it is important to note that these beliefs are not supported by scientific evidence and should be taken with a grain of salt. Ultimately, the use of black stones in divination is a matter of personal belief and superstition.