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Gold, Molybdenite, Silver, Pyrite.
A sluice box separates gold from sand and gravel as the gold catches on the ridges in the bottom.
Here is a list of all of the naturally occurring minerals in Utah: http://www.tigerminerals.com/ut.htm The most valuable would likely be silver, topaz, and turquoise.
gold, gold, and more gold
Gold, Gold, and more Gold.
Placer gold is gold that has been weathered from the host rock. It has been formed and placed either on a stream bed, hillside or alluvial fan by the action of glaciers, water or other geological forces.
Gold
gold sand gravel silver coppen nickel lead
Gold nuggets are as small as gravel or sand grains, while gold ore is large and is a group of minerals.
electrolytic refining
Pure gold is yellow (gold colored), white gold contains very little gold.
== == The most valuable rocks would be those partly comprised of the most valuable minerals such as gold, silver, and precious gemstones.
Some of them include:GoldCopperIronAluminum (bauxite)There are also important operations of limestone, clay, gravel and sand. The most important minerals for export include gold and iron.
California's major mineral resources include, gravel, crushed stone, building stone, gold, silver, iron, evapite minerals, and clay
Gold, Molybdenite, Silver, Pyrite.
The only sort of minerals that may be found in Alberta would be sand and gravel, sandstone, granite, limestone, iron, magnetite, gold, salt, diamonds, metallic minerals, ammonites, quartz, etc.
Jewelry is valuable due to the materials it is made up of. Jewelries are usually made of valuable minerals such as gold, diamond, and ruby; all of which have high and appreciating market value.