Rock samples should be taken from cores which sampled from drillings have all lithologies of region. The size range of sampling depends on available information, distribution & geology structure of mine rocks in surrounding area. In addition, the purpose of sampling can also has effect on type of sampling project.  The information gathered from rock sampling may be used for characterization of mine rock types and determination of the extent of oxidation, storage of products and rock classification using available instruments.
Samplers should be fully known of heterogeneity and types of material sampled and regulate the sampling point.

Rock Sampling Methods
Different techniques of rock sampling include:
Point samples: A single grab sample chosen to represent some mass; or it can be random samples taken from various source points, generally within a predetermined area, and can be either in two dimensions or three dimensions and in composition.
Linear samples: Continuous sampling over an interval in a line such as channel samples and/or profile sampling of overburden
Panel samples: These are planar samples made up of multiple chips collected from a surface with dimensions
Bulk samples: Sampling of a large mass of material that will be crushed and split into fractions. Samples may be taken from the various splits.
This databank includes information about different methods of rock sampling.

Rock Sampling Instruments
For achieving different exploration objectives of rock sampling such as analysis and etc, the proper instrument is required which are completely introduced on this databank.      

Rock sampling resources include: 
• Drill core
• Blast hole cuttings
• Trenches
• Exploration adits
• Bulk sampling for metallurgical testing

Purposes:
1. Collection of mineral & rock samples for mineral evaluation. Because average samples may be used, preparation of samples & indicators are of great importance. For example, hand sampling, sampling from mines and canal sampling.  
2. Cutting a piece of mineral deposit (coal) which may be a full representative of average mineral. Most often, the size of a trench which prepared have thickness of  4 inch (10.2cm) , and depth of 2 inch(5.1 cm)
3. Selection of a piece of mineral or coal from stock piles, etc. for analytical processes
4. Separation of a representative piece of sample, core, and other sampling products for use in tests & analytical purposes
In this section, different samples, instruments & tools used for sampling are introduced.