Soapstone contains the soft mineral, talc, which is an alteration product of ultramafic rocks, and is used in making talcum powder.
(Soapstone; contains; the soft mineral, talc, which is an alteration product of ultramafic rocks) (the soft mineral, talc; is; an alteration product of ultramafic rocks)
Soapstone the soft mineral, talc
contains is
the soft mineral, talc, which is an alteration product of ultramafic rocks
an alteration product of ultramafic rocks