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Fig. 9. Mineralogical properties of San Benito County parent material: (A) x-ray diffractogram of serpentine; (B) photomicrograph under plane-polarized light of serpentine (SY) with opaque inclusions (15-mm-wide field of view); and (C) backscatter electron micrograph increased contrast and lowered brightness eliminates outlines of serpentine (SY) crystals that dominate the parent material but distinguishes between chromite spinel (SP) at center surrounded by chrome-rich andradite garnet (GN), while lightest gray is magnetite (MT).
