If that is mineralisation you don't need an electron microscope...

If that is mineralisation you don't need an electron microscope (200,000 x magnification). A good geologist should tell you what that is with one of these (10 x magnification).

If not with a hand lens, in thin section under an optical microscope (1,200 x magnification maximum). Funny how you avoid discussing the truth. The yellow bits look like limonite to me and the light coloured bits could be any light coloured minerals that have just caught the light in the right direction. Time BBX got a petrographic report out on the visible "sulphides" they claim to be seeing with their naked eyes in this gabbro. Esh