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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.
What else can I help you with?
When a mineral is rare to locate it is called a?
When a mineral is rare to locate, it is typically referred to as a "rare mineral" or "rare earth mineral." These minerals are not readily abundant in the Earth's crust and can be challenging to find and extract.
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 evaporite minerals. These minerals form when seawater evaporates, leaving behind dissolved minerals that precipitate and crystallize into minerals like gypsum, halite, and calcite. Evaporite minerals are commonly found in areas with high rates of evaporation, such as salt flats and arid regions.
Halides oxides and sulfates are examples of what minerals?
These are examples of mineral classes. Halides are minerals that contain halogen elements, oxides are minerals composed of oxygen and a metal, and sulfates are minerals that contain sulfate ions bonded to a metal.
What are some examples of nonsilicate minerals?
A non silicate mineral is a mineral that does not hold silica tetrahedron. Some examples of non silicate minerals are oxides, sulfides, sulfates, halides, and carbonates.
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 gem is not a mineral?
Opal and amber are not minerals.
What is a mineral gem?
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
Are there any famous examples of the moonstone gem?
a moonstone gem is a stone that looks white like the moon
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
How is a sapphire dependent on minerals explain?
Sapphire is a gem-quality variant of the mineral corundum.
What are minerals What kinds of minerals are considered gems?
Minerals are naturally occurring inorganic substances with a defined chemical composition and crystalline structure. Gems, or gemstones, are specific types of minerals that are prized for their beauty, rarity, and durability. Common examples of gem minerals include diamonds, rubies, sapphires, and emeralds, which are often cut and polished for use in jewelry. Other minerals, like quartz and topaz, can also be considered gems when they possess desirable qualities for aesthetic purposes.
Is a mineral a gem or an ore?
Either, or both. Minerals are usually considered gems if they are valuable, attractive and highly pure. Minerals are considered ores if they are used to extract a substance. For example, pure haematite is polished and sold as a gem, while crude haematite is used to extract iron.
