[DOC] [TLE] Anthracite - Wikipedia [PAR] Anthracite is a hard, compact variety of coal that has a submetallic luster. It has 
the highest carbon content, the fewest impurities, and the highest calorific content 
of all types of coal except for graphite. ... Other terms which refer to anthracite are 
black coal, hard coal, stone coal, dark coal, coffee coal, blind coal (in Scotland),... [DOC] [TLE] Classification and Rank of Coal . University of Kentucky [PAR] a diagram illustrates classification and rank of coal: Peat, Lignite, sub-bituminous 
... As time passes, lignite increases in maturity by becoming darker and harder 
and is then classified as sub-bituminous coal. ... Anthracite coal is very hard and 
shiny. ... As time, heat, and burial pressure all increase, the rank does as well. [DOC] [TLE] Different types of Coal  Coal Types WA | Griffin Coal [PAR] There are four different types of coal; Peat, Lignite, Black Coal and Anthracite, 
they have different properties dependent on their age and ... Vast specifications 
from locations all over the world. ... As the coal develops it loses its fibrous 
character and darkens in colour. ... These coals are harder and shinier (
bituminous coal). [DOC] [TLE] Black Gemstones and Minerals | Gem5.com [PAR] ... material composed of lignite, and is a bituminous coal which can be polished. 
... Its color is shiny black, with clear conchoidal (shell-like)fracture, its texture ... 
minerals in which magnesium may be replaced with iron, zinc, and above all, .... 
Thus diamond is much harder and has a higher specific gravity (3.52) than 
graphite... [DOC] [TLE] Black coal is a hydrocarbon based fossil fuel, consisting mainly of ... [PAR] Black coal is one of the major sources of world energy supplies, the majority of 
which ... millions of years, coal matures from a soft peat, through to its hardest 
form, graphite. ... sub-bituminous and bituminous coal, through to shiny black 
anthracite. ... Most countries have coal deposits, however not all of them are 
commercially... [DOC] [TLE] coal - National Geographic Society [PAR] Dec 22, 2012 ... Coal is a black or brownish-black sedimentary rock that can be ... at a very slow 
rate and retained most of its carbon (source of energy). ... it becomes the familiar 
black and shiny substance burned as fuel. ... Bituminous coal accounts for almost 
half of all the coal that is used for energy in the United States. [DOC] [TLE] Untitled Prezi by Miranda Nelson on Prezi [PAR] Fossil Fuels (coal) By: Miranda&Trent Coal is a hard, black colored rock-like 
substance. ... Peat; can be used as feul in its dehydrated form. Lignite ... 
Anthracite is the hardest and most brittle of all coals, and when burned, ... A shiny 
black rock. [DOC] [TLE] The types of rock: igneous, metarmorphic and sedimentary [PAR] Jan 12, 2015 ... It's the first thing you learn in a geology class  what are the types of rock? ... 
crystals, and the black crystals, which can be either black mica or amphibole. ... 
and they are generally the hardest and heaviest (densest) of all rocks. ... Coal is 
another example of biochemical rock. chemical rocks; these rocks... [DOC] [TLE] Anthracite Coal Characteristics and Applications - The Balance [PAR] Aug 3, 2016 ... A shiny black rock, anthracite is primarily used for heating residential and ... The 
coal is slow-burning and difficult to ignite because of its high density, ... A tiny 
percent of all remaining coal resources are anthracite. ... 1900s, and remaining 
supplies became harder to access because of their deep location. [DOC] [TLE] coal facts, information, pictures | Encyclopedia.com articles about coal [PAR] Coal is classified according to its heating value and according to the ... All forms 
of coal also contain other elements present in living organisms, such as sulfur... [DOC] [TLE] Metamorphic Rock Classification - faculty at Chemeketa [PAR] The first thing to notice when you look at a metamorphic rock is its texture. Is the 
rock

Question: It's shiny & black & the hardest of all coals
Answer: Anthracite