sample
limited quantity of material which is intended to be similar to and represent a larger amount of that material
type specimen
mineralogy: material of a mineral species
core sample
cylindrical section of a naturally occurring substance, usually obtained by drilling into it with special drills
aliquot
known fractional part of a homogenous chemical sample
biological specimen
sample or representative specimen of a class of organisms
Metallographic sample
Type of analysis sample
thin section
laboratory preparation rock, mineral, soil, pottery, bones, metal for petrographic microscope