Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
|
Gems
|
a rare mineral prized for their beauty
|
|
|
gemstone
|
a durable and beautiful mineral that can now be cut and polished
|
|
|
important gems
|
rubies are used in laysers, quartz is used in electronics and timepieces, industial diamonds are used to heavy duty drills synthetic diamonds are now indistinguishable from the natual ones
|
|
|
pearls
|
formed from oysters so they are organicly created
|
|
|
Opals
|
lack crystaline structure
|
|
|
Ores
|
minerals or a combination of minerals from which metals or nonmetals can be distracted in usable amounts
|
|
|
metals and examples
|
are minerals or elements that usually have shiny surfaces that are a good conducor of heat and electricity
iron gold and aluminum |
|
|
smelting
|
a process in which ore is made so hot that metals of other useful substances may be extracted
|
|
|
Metals which are not mierals include:
|
steel: made with conium and iron
brass: made from copper and Zinc not naturally occuring |
|
|
nonmetals
|
have dull surfaces and are usually poor conductors of electricity
ex. sulfer |
|
|
vein minerals
|
minerals that will fill up cracks and fractures in a rock. Sometimes they will fill empty spaces caused by collapsed rocks
|
|
|
titanium and example
|
a lightweight, durable metal that can be extracted from two minerals
ilmenite and rutile |
