يمكن أن يكون الجبس الحاصل على تصنيف ISO 4 حجرًا خاصًا ، أو يُعرف عادة
Gypsum with an ISO rating of 4 can be a specialty stone, or all the more usually known as a kick the bucket stone. Most
Asian Chemical Stone is more grounded and more costly than mortar. It is utilized mostly in making projects for symptoma