ShABA

ShABA, shabah (gagat), yak nav angishtsangi siyohi khiraest, ki hangomi shikastan parraparra judo meshavad.

Sakhtiash 3—3,5; zichiash qarib 1,3—1,4 g/sm2. Tanai darakhtone, ki zeri loyqai bahrhoi qadimi monda budand, az tasiri moddahoi khimiyavi, garmi va fishori ziyod ba Shaba tabdil meyoband. Shaba odatan dar bayni regsang, mergel, inchunin dar bayni qabathoi angishtsangu angishti buri erahoi mezozoyu kaynozoy vomekhurad. Shaba ba osoni sufta shuda, badi sayqal dodan khushjilo megardad. Binobar in az on (makhsusan dar Sharq) har guna armugon, az jumla muhra tasbeh va g. tayyor mekunand.