This note adapts legacy handbook guidance into a modern, engineer-facing reference for diamond core drilling [1]. Terminology is kept close to the sources where it carries meaning (e.g., mesh, stones per carat, gauge stones), with brief clarifications for today’s readers.   1) What an impregnated bit is made of Impregnated bits are produced by combining screened...

A field-focused note for core logging and rig decisions. Diamond core bits shown with a hard rock sample (equipment context). The terms [1] below help drillers, geologists, and core loggers stay aligned on what is in the hole and why it behaves the way it does.   Three rock families used in day-to-day core logging Igneous rocks Igneous rocks form when molten material...