According to official data, at present, the output of pumice in Sibin is exhausted, and the prices of related industries are rising all the way. The prices of products generally broke through the 700 yuan mark. It is expected that this rare ore will have a market but no market in the near future, and hoarding will become a common situation. At the same time, a large number of counterfeit stone products will seize the opportunity to occupy the civilian market of ordinary people. According to the budget estimate of the market, the annual output of pumice in Sibin is less than 1 10,000 cubic meters, while the annual sales volume of the market has reached 5 million cubic meters. In other words, only one of the 500 bian stone products currently on the market is genuine!
The pumice in Sibin, produced in the coastal area of Surabaya, Shandong Province today, is dark taupe and jade-like, with fine texture and moderate hardness. It is the top grade mixed with irregular khaki patches.
Excerpted from Bian Shi's Treatment and Health Care Beauty, page 42.
Lingbi stone is a kind of ornamental stone, and its most striking feature is that it is completely black and occasionally has white lines, or "edges" or can be used as bells. However, its far infrared, ultrasonic and musical acoustic functions are far from those of Sibin, Bian Shi. What's more, for commercial purposes, it seems essential to pretend to be Spinstone, but its effect is not the same as Spinstone.
From Bian Shi's Treatment and Health Care Beauty, page 49.