1/81
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced |
---|
No study sessions yet.
Minerals
Naturally occurring inorganic solids, with a specific chemical composition and a crystalline structure
Naturally occurring
Inorganic
Homogenous
Definite chemical composition
Solid-ordered internal structure
The five properties of minerals
Mineraloid
Naturally occurring, inorganic compound, that is amorphous and does not exhibit crystallinity
Mineral habit/form
External expression of a mineral’s internal orderly arrangement of atoms
The shapes and aggregates that a certain mineral is likely to form
Acicular
Mineral habit composed of slender, needle-like crystals
Acicular
Mineral habit composed of slender, needle-like crystals
Banded
Mineral habit appearing as alternating layers or bands of different colors and/or textures
Banded
Mineral habit appearing as alternating layers or bands of different colors and/or textures
Botryoidal
Mineral habit that is characterized by a globular or rounded shape bunched together
Botryoidal
Mineral habit that is characterized by a globular or rounded shape bunched together
Cubic
Mineral habit that displays faces meeting at 90-degree angles due to underlying crysta structure
Cubic
Mineral habit that displays faces meeting at 90-degree angles due to underlying crysta structure
Druzy
Mineral habit wherein a surface is coated with fine crystals
Druzy
Mineral habit wherein a surface is coated with fine crystals
Fibrous
Mineral habit which grows in long, thin, hair-like crystals
Fibrous
Mineral habit which grows in long, thin, hair-like crystals
Geode
Mineral habit with a hollow, vaguely spherical rock with a lining of mineral matter
Geode
Mineral habit with a hollow, vaguely spherical rock with a lining of mineral matter
Prismatic
Mineral habit characterized by elongated, prism-like crystals with parallel faces
Prismatic
Mineral habit characterized by elongated, prism-like crystals with parallel faces
Tabular
Mineral habit describes crystals that are flat and plate-like
Tabular
Mineral habit describes crystals that are flat and plate-like
Luster
It is the ability of minerals to reflect light
Metallic
Luster that refers to a reflective, opaque appearance similar to polished metal
Metallic
Luster that refers to a reflective, opaque appearance similar to polished metal
Glassy/vitreous
Luster that appears as a bright, smooth, reflection of transparent or transluscent material that appears as glass
Glassy/vitreous
Luster that appears as a bright, smooth, reflection of transparent or transluscent material that appears as glass
Resinous
Luster that resembles that of amber
Resinous
Luster that resembles that of amber
Greasy
Luster that appears as if mineral is coated in oil or grease
Greasy
Luster that appears as if mineral is coated in oil or grease
Pearly
Luster that resembles the inside of a mollusk shell
Pearly
Luster that resembles the inside of a mollusk shell
Color
Characteristic caused by the absorption or lack of absorption of various wavelengths of light
Can also be caused by impurities which makes it not a good diagnostic property
Malachite
Mineral habit - acicular
Luster - glassy/vitreous
Color - dark green
Olivine
Mineral habit - druzy
Luster - glassy/vitreous
Color - light green
Sulfur
Mineral habit - druzy
Luster - greasy
Color - yellow
Fluorite
Mineral habit - cubic
Luster - resinous
Color - purple (but can be blue)
Azurite
Mineral habit - prismatic
Luster - glassy/vitreous
Color - blue
Quartz (left to right): milky quartz, citrine, green aventurine, smoky quartz, rose quartz, amethyst, sapphire quartz, milky quartz
Corundrum
Streak
It is the color of a mineral in powdered form
Metals
These minerals usually have a dark streak
Crocoite: yellow
Chalcopyrite: black
Cinnabar: red
Molybdenite: gray
Identify the mineral and its streak
Hardness
It is the property described as the resistance of minerals to abrasion or scratching
Talc → Gypsum (fingernails) → Calcite (copper coin) → Fluorite → Apatite (knife/glass) → Feldspar (steel) → Quartz → Topaz → Corundum → Diamond
Cleavage
The tendency of a mineral to break in particular directions due to zones of weakness in the crystal structure
Basal/platy: muscovite
Cleavage where the mineral breaks along one direction of a set of parallel planes, resulting in thin, flat sheets (also identify mineral)
Prismatic: feldspar
Cleavage where the mineral breaks along two planes (also identify mineral)
Prismatic: hornblende
Cleavage where the mineral breaks along two planes (also identify mineral)
Cubic: halite
Cleavage where the mineral breaks in three directions (also identify mineral)
Cubic: calcite
Cleavage where the mineral breaks in three directions (also identify mineral)
Octahedral: fluorite
Cleavage where the minerals break in four directions (also identify the mineral)
Fractures
Irregular breakages that occur when bond strengths in a crystal structure are equal in all directions
Conchoidal fracture
Fracture with smooth, curved surfaces, which are typically concave
Irregular fracture
Fracture with a rough, uneven break, rather than straight lines or specific patterns
Reaction to chemicals → magnetism → fluorescence → feel → taste → double refraction → tenacity → odor
Other properties (from top to bottom, left to right)
Silicates
Largest group of minerals (90% of the Earth’s crust)
Contain silicon and oxygen
Feldspar and quartz
Two most common silicate minerals
Silicon-oxygen tetrahedron
Building block of silicate minerals
Silicates
What mineral group?
Carbonates
Mineral group with a polyatomic anion with the formula (CO2)-3
Has a trigonal planar molecular structure consisting of a carbon atom surrounded by three oxygen atoms
Calcite
Formula is CaCO3 and is the most common carbonate mineral
Carbonates
What mineral group?
Native elements
Mineral group that contain atoms of only one type of element
Only a small number of minerals are found in this category
Halides
Mineral group with halogens bonded with various metallic atoms
Oxides
Mineral group that contain one or two metal elements combined with oxygen
Many important metals are found in this form
Phosphates
Mineral group that are similar in structure to silicate minerals
Phosphorus, arsenic, or vanadium bond to oxygen to form a tetrahedron
Sulfates
Minerals that contain sulfur atoms bonded to oxygen atoms
They form where salt water evaporates
Contains many different minerals but only a few are common
Sulfides
Formed when metallic elements combined with sulfur but without oxygen
Pyrite
Mineral made of iron sulfide which is also known as fool’s gold
Plagioclase feldspars
Most abundant mineral in the crust
Quartz, mica, feldspar, olivine
Identify minerals (left to right, top to bottom)
Pyroxene, olivine, calcite, clay
Identify minerals (left to right, top to bottom)
Carbonates, hematite
Identify minerals (left to right, top to bottom)
Ore
Useful metallic (and non-metallic) minerals that can be extracted and which contain useful substances
Bauxite, chromite, bornite chalcopyrite, native gold, hematite, sphalerite
Identify the ore
Gemstones
Any of various minerals highly prized for beauty, durability, and rarity
Luzonite
Mineral named after its occurrence in Mankayan, Luzon Island
Prehnite
Named after Dutch colonel, Hendrik von Prehn for discovering the stone in Cape of Good Hope, South Africa
Pigeonite
Named after the type locality, Pigeon Point, Minnesota, USA
Cummingtonite
Named after the town of Cummington, Massachusetts
Jadarite
Similar composition to Kryptonite, named after the Jadar Basin, Serbia