Slate

FoliatedCrystalline micaLow, dull sheenLow grade

shale

Calcitic marble

NonfoliatedCalciteSugary sparkleLow grade

limestone

Anthracit coal

NonfoliatedCarbon rich no minerals

Very shiny brittle

Low to intermediate

Bituminous coal

Gnesis

FoliatedQuatz,feldspar,hornblende

Dark and lightHigh grade

Schist

Garnet-mica schist

Weakly foliatedMica,garnet prophyroblastsPerfect small crystals of garnetIntermediate 2high grade

phyllite

Hornfels

NonfoliatedDark ferromagnesianDull granularLow grade

Possibly basalt

Quartzite

NonfoliatedQuartzh=7,dense, pure quartz

Variable

sandstone

Granite gnesiss

Foliated

Quartz,orthoclase,micaColor banded dark & light

High grade

Granite

Phyllite

FoliatedMica,microcrystallineVelvety sheen,wrinkeled clev.Intermediate grade

Slate

Mica schist

FoliatedMicaDark color, dull sheen, good clev

Intermediate to high grade

phyllite

Metaconglomerate

NonfoliatedQuartz, chert

Stretched pebblesLow to intermediate grade

conglomerate

Talc schist soapstone

FoliatedTalc

Soapy feelLow grade

greenstone

Quartzite

NonfoliatedQuartz

H=7, dense, pure quartzIntermediate, variable

sandstone

Amphibolite hornblende schist

Weakly foliatedHornblende

Hornblende crystals alignedIntermediate to high grade

Andesite, or basalt

Slate

FoliatedMicro-crystalline mica

Low, dull sheenLow grade

shale

Gneiss

FoliatedQuartz, feldspar, micaDark & lightHigh grade

Schist or granite

Gneiss greenstone

Foliated

Chlorite

Soft, shiny flakesHigh or low grade

basalt

Dolomitic schist

Non or foliatedMica, weathered garnet dolomitic

CrystallineIntermediate?

dolostone

Chlorite schist

FoliatedChlorite

High sheen, wrinkeled clev.Low grade

basalt

Graphite schist

FoliatedGraphite

Very dark, soft, shinyHigh grade

Anthracite coal

Serpentinite

Weakly, or nonfoliatedSerpentine, some quartz

Dark green, dull Low grade, variable

periodotite

Slate

FoliatedMicro-crystalline mica

Dull sheenLow grade

shale