The surrounding or encompassing and current state of an area
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Category: <span>A</span>
The formation of usually fossilized amorphous hydrocarbons from ancient tree resins, having highly variable C:H:O ratios
A bright green or blue green variety of microcline sometimes cut as semi precious stones and for ornamental use
Alloys of mercury with one or more metal
A light, silvery-white, ductile metal with high electrical conductivity and high resistance to oxidation. Symbol, Al
Physical and chemical changes in a rocks or mineral subsequent to initial formation, and to a lesser degree than metamorphosis
Positively charged particles emitted from radioactive material
An orthorhombic mineral, Al2SiO5; its transparent green variety is used as a gem
Instrumentation used in measuring positively charged particles (Alpha rays) from radioactive sources
An instrument used to determine properties of a mineral or substance, to achieve distinguishable, measurable and recordable attributes