Shanxi Black이 채석된 지 얼마나 되었나요?, 그리고 공급이 안정적인가요??

Large-scale quarrying of Shanxi Black began around 1990. The total reserves are estimated at 193 million cubic meters. The mining area has a stable rock mass with large block sizes available for extraction. 하지만, premium-quality Shanxi Black is considered a finite resource, and quarry output is limited, which contributes to its premium pricing. Major mining operations in the area include companies like Taiwan Mashan Mining (Shanxi) Co., Ltd., which produces approximately 5,000 cubic meters of raw blocks annually.