gold mining
Rocks that are Rounded, Subrounded 
and Subangular
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precious metal futures
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Rocks that are Rounded, Subrounded and Subangular

 

Rock Fragment :
Boulder
Size of Fragment: More than 256 mm
Aggregate: Boulder, gravel or conglomerate

Rock Fragment: Cobble
Size of Fragment: 64 to 256 mm
Aggregate: Cobble, gravel and cobble conglomerate

Rock Fragment: Pebble
Size of Fragment: 4 to 64 mm
Aggregate: Pebble conglomerate and pebble gravel

Rock Fragment: Granule
Size of Fragment: 2 to 4 mm
Aggregate: Granule sand

Rock Fragment: Sand
Size of Fragment: 1/6 mm to 2 mm
Aggregate: Sand and sandstone

Rock Fragment: Clay
Size of Fragment: Less then 1/256 mm
Aggregate: Clay and shale

 

Gold Mining &  Gold Prospecting Gold Minerals Rocks that are Rounded, Subrounded  and Subangular How Rocks are formed Basic Mineralogy Native Gold Electrum Gold tellurides Other gold minerals. Main Types of Placers Obtaining Mining Permits and why they are Necessary Occupations in the Mining Industry The Diverse Uses of Gold Geological Agents The Properties of Minerals Geology of Streams Mining Terminology

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gold rocks + minerals
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