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1. PYRITE- Also known as fools gold, it is used as an ornamental material.
2. OLIVINE-The gem quality variety is known as peridot.
3. GARNET- A common mineral, but rarely having gem quality or color.
4. CORUNDUM-The gem quality grade of corundum is sapphire.
5. AMAZONITE- A rare green form of microcline feldspar.
6. SPODUMENE- A lithium aluminum silicate. Kunzite is the gem variety.
7. TURQUOISE-A copper mineral that has been used as a gem by America Indians for centuries.
8. AGATE-A banded form of quartz used for carvings and ornamental stones.
9. SNOWFLAKE OBSIDIAN-A form of volcanic glass, the snowflakes are inclusions of the mineral cristobalite.
10. TOURMALINE-Black tourmaline is commonly found in pegmatites. Gem tourmaline is usually green, pink or blue.
11. JADEITE - The gem quality is used in sculptures and costume jewelry.
12. AMETHYST-A purple variety of quartz used in jewelry.
13. RHODONITE-A magnesium silicate mineral used in jewelry and carvings.
14. QUARTZ CRYSTAL- Collectors of quartz crystals first believed that quartz crystals, or rock crystals were petrified ice.
15. BERYL-A beryllium aluminum silicate, aquamarine and emerald are gem varieties of this mineral.
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When a mineral is rare to locate it is called a?
Rare minerals are called rare earth minerals. Their major metal constituents contain one or more rare earth elements. Some common hydrothermal rare minerals include zircon, gadolinite, brockite, and titanite.
Is a gem a rock?
A gem is considered any attractive mineral or rock which when cut and polished, may be used for ornamentation. A gem can be either a mineral or a rock, but most gems are minerals. A rock is an aggregate of many minerals, with no specific structure, while a mineral has a much more ordered atomic structure, with specific physical and chemical properties. A gem is not necessarily a crystal; lapis lazuli is not a mineral or a crystal, yet can still be considered a gem due to its desirable color and traits when polished.
Minerals that crystallize directly from seawater are examples of?
Minerals that crystallize directly from seawater are examples of hydrogenous sediment.
What are some examples of major rock forming minerals and ore minerals?
== ==
Halides oxides and sulfates are examples of what minerals?
non-silicate.
What are examples of a gem that is a mineral?
Opals, rubies, emeralds, diamonds, and sapphires are all minerals. In fact, all gems are minerals with the exception of pearls, which have a biological origin.
What is a gem can all minerals be gems?
no
What is a mineral gem?
Opal and amber are not minerals.
What gem is not a mineral?
Opal and amber are not minerals.
What is gem stone can all minerals be gem stones?
Stones that are rare, and look beautiful are considered Gems.
How is gem different from minerals?
a gemstone is precious a mineral is a rck
What minerals is in a peridot gemstone?
Peridot is composed of the mineral olivine, which is a silicate mineral containing magnesium and iron. Its characteristic green color is due to the presence of iron in its crystal structure.
When a mineral is rare to locate it is called a?
Rare minerals are called rare earth minerals. Their major metal constituents contain one or more rare earth elements. Some common hydrothermal rare minerals include zircon, gadolinite, brockite, and titanite.
What qualities must a mineral possess in order to be considered a gem.?
All gems are minerals, but not all minerals are gems. In order for the mineral to be classified as a gem, the mineral must have very specific qualities. Minerals are judged on the following:beautydurabilityrarityportabilityand among other things..Submitted answer does not answer the question nor is it correct. All Gems are not minerals. A Gem is a piece of rock or mineral, which, in cut and polished form, is used to make jewelry or other adornments.
Why are some minerals classifyes as gems?
Because of their shiny (gem-like) images
Are there any famous examples of the moonstone gem?
a moonstone gem is a stone that looks white like the moon
Is a gem a rock?
A gem is considered any attractive mineral or rock which when cut and polished, may be used for ornamentation. A gem can be either a mineral or a rock, but most gems are minerals. A rock is an aggregate of many minerals, with no specific structure, while a mineral has a much more ordered atomic structure, with specific physical and chemical properties. A gem is not necessarily a crystal; lapis lazuli is not a mineral or a crystal, yet can still be considered a gem due to its desirable color and traits when polished.
