RE:RE:Grab Sampleshttps://rogermarjoribanks.info/collecting-rock-chip-samples/
SAWN-ROCK CHANNEL SAMPLING
This is the most accurate, objective and reliable way of determining the width and grade of outcropping mineralisation. It is also the slowest and physically hardest way to collect a rock sample. Such samples will normally be collected in a mine environment (or exploration trenches and costeans) were continuous exposure of fresh rock is exposed on accessible, approximately-flat, faces. Results from carefully collected sawn-rock channel samples have the same status as assays obtained from diamond core drilling, and can be used as an input to ore reserve calculations or the basis for company public announcements.