rocks️️the raw materials of gemstone formation
the continental crust️️most colored stones form in...
gem formation️️geological conditions during mountain building are favorable for...
slow cooling️️In igneous rocks, large crystals indicate
quick cooling️️In igneous rocks, sm...
GIA Colored Stones Assignment 2 with comprehensive questions
and answers 2024/2025
rocks✔️✔️the raw materials of gemstone formation
the continental crust✔️✔️most colored stones form in...
gem formation✔️✔️geological conditions during mountain building are favorable for...
slow cooling✔️✔️In igneous rocks, large crystals indicate
quick cooling✔️✔️In igneous rocks, small crystals indicate
volcanic rock✔️✔️What can transport existing gems from deep in the crust to the earth's surface?
pegmatites✔️✔️Some of the largest and most perfect gem crystals come from...
gems✔️✔️superheated, pressurized water can transfer minerals in solution and redeposit them in
veins to form...
mining economics✔️✔️demand, political climate, labor costs, environment, accessibility, type of
deposit, and mining methods all effect...
an understanding of gemstone formation✔️✔️What helps prospectors pick the right places to look
for gems?
thousands of tons✔️✔️What amount of rock may be eroded to yield only a few ounces of gem
material?
, secondary deposits✔️✔️What are easier to work than primary deposits?
primary deposits✔️✔️What contains less concentrations of gems than secondary deposits?
secondary deposits✔️✔️Only the toughest gems survive to become part of...
alluvial deposit✔️✔️A deposit where gems are eroded from their source rock, then transported
away from the source and further concentrated.
contact metamorphism✔️✔️Localized changes caused by an igneous intrusion that takes place
where the magma meets the surrounding rock. New minerals may form due to temperature
changes or introduction of fluids from the magma.
core✔️✔️The earth's innermost layer
crust✔️✔️The surface and outermost layer of the earth
eluvial deposit✔️✔️A deposit where gems are eroded from the source rock but remain in place
close to the source.
erosion✔️✔️The wearing away and transport of rock materials by natural forces.
geode✔️✔️A spherical, often hollow, mineral-lined cavity in rock.
heavy minerals✔️✔️Minerals dense enough to become concentrated and separated from lighter
ones by the action of surface water.
hydrothermal fluid✔️✔️Hot, high-pressure solution that can dissolve, transport, and deposit
minerals from one place to another.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller johndocs. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
