Little Mountain Geos Mineral Library — summaries, articles, photos, mine locations and geology
LITTLE MOUNTAIN GEOS EDUCATION

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Search every Little Mountain Geos reference by mineral, variety, alternate name, locality, country, mine, associated mineral or keyword.

A–Z Mineral Library131 reference entries
A

Adamite

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A

Aegirine

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A

Afghanite

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A

Agate (East Java Plume Agate)

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A

Agate (Grape Chalcedony)

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A

Agate (Orca)

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A

Agate (Volcano)

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A

Agni Manitite

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A

Amazonite

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A

Amethyst

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A

Ammonite (Alberta)

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A

Angelite

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A

Apatite

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A

Apophyllite

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A

Aquamarine

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A

Aragonite (Blue)

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A

Aragonite (Sputnik)

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A

Aragonite (White)

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A

Aragonite Chrysocolla

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A

Arfvedsonite

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A

Aura Quartz

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A

Axinite

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A

Azurite

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B

Barite

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B

Bismuth

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B

Black Garnet

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B

Bloodstone (African Bloodstone)

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B

Bloodstone (Dragon Bloodstone)

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B

Bloodstone (Heliotrope)

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B

Blue Amber

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B

Blue Coral

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B

Blue Lace

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B

Brookite

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B

Brucite (Blue)

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B

Bulgarian Minerals

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C

Calcite (Caribbean)

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C

Calcite (Dogtooth)

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C

Calcite (Honey Orange)

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C

Calcite (Panda)

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C

Calcite (YGX)

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C

Calcite (Zebra Dogstooth)

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C

Calcite

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C

Carrollite

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C

cataranite

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C

Celestite

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C

Chalcopyrite

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C

Chinese Writing Stone

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C

Chlorite in Quartz

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C

Chrysocolla

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C

Chrysopal Kaolinite (Indonesia)

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C

Citrine (Congo)

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C

Cobalto Calcite

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C

Copper

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C

Cyanotrichite

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D

Desert Rose (Gypsum)

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D

Diopside

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D

Dioptase

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E

Emerald

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E

Epidote

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E

Epidote2

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E

Erythrite

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F

Faden Quartz

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F

Faden Quartz

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F

Fenster Quartz

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F

Fluorite - Black Rose

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F

Fluorite - Indigo (Blueberry)

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F

Fluorite - Russian Blue

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F

Foitite

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F

Fossil Clam Shell

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F

Fossil live

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G

Garnet 2

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G

Garnet

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G

Garnierite-Limonite (Indonesia)

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G

Gibbsite

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G

Goethite

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H

Hackmanite

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H

Hematite (Specularite)

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H

Hemimorphite

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I

Indigo Gabbro (Mystic Merlinite)

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I

Iron gall

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K

K2 Stone

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K

Kambaba Jasper

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K

Kyanite

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L

Labradorite

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L

Lapis Lazuli

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L

Lazurite

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L

Libethenite

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M

Magnesium

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M

Malachite - Variations

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M

Malachite

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M

Mica (Biotite)

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M

Mica (Lepidolite)

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M

Mica

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M

Moonstone

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N

Natrolite

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N

Noreena Jasper

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N

Noreena Jasper

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O

Obsidian

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P

Petrified Wood

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P

Pink Aragonite

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P

Pink Kunzite

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P

Prehnite

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P

Prophecy Stone

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P

Purpurite

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P

Pyrite

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P

Pyromorphite

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Q

Quartz

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R

Rubellite

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R

Ruby Zoisite

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R

Rutile in Quartz

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S

Scapolite Marialite

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S

Scolecite

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S

Selenite

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S

Septarian Nodule

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S

Serpentine

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S

Shungite

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S

Siderite

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S

Sodalite

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S

Spinel

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S

Spirit Quartz

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S

Stichtite Serpentine (Atlantasite)

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T

Terahertz and Thunder Bay Amethyst

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T

Topaz (Shigar,Pakistan)

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T

Tourmaline (Black)

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T

Tourmaline (Blue)

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T

Tourmaline (Green)

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T

Tourmaline (Pink -Namibia)

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T

Tourmaline (Yellow)

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T

Truffle Chalcedony

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V

Vivianite

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Z

Zeolites

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LONG-FORM EDUCATION

Mineral Articles

Comparisons, locality features and broader stories from the Little Mountain Geos educational collection.

01

MINERAL ARTICLE

The Naica Crystals

A visual introduction to the extraordinary giant crystals of Naica.
02

MINERAL ARTICLE

Adularescence & Labradorescence

A visual comparison of two distinctive optical effects seen in feldspar minerals.
03

MINERAL ARTICLE

Andalusite vs. Chiastolite

How andalusite and its cross-patterned chiastolite variety are related.
04

MINERAL ARTICLE

About K2

A closer look at the material commonly known as K2.
05

MINERAL ARTICLE

Labradorite vs. Larvikite

A customer-friendly visual guide to distinguishing labradorite from larvikite.
06

MINERAL ARTICLE

About Malachite

An illustrated introduction to malachite.
07

MINERAL ARTICLE

Agates: Moss, Tree & Banded

A visual comparison of moss, tree and banded agate varieties.
08

MINERAL ARTICLE

Angelite vs. Celestite

A quick visual guide to angelite and celestite.
09

MINERAL ARTICLE

Apatite: Did You Know?

An illustrated mineral fact feature about apatite.
10

MINERAL ARTICLE

Brookite

An illustrated mineral feature about brookite.
11

MINERAL ARTICLE

The Fibonacci Sequence & the Ammonite

An exploration of the Fibonacci sequence, the golden spiral and ammonites.
12

MINERAL ARTICLE

Emerald

An illustrated mineral feature about emerald.
13

MINERAL ARTICLE

Epidote: Why Do They Look Different?

How locality and formation conditions influence the appearance of epidote.
14

MINERAL ARTICLE

Evolution of Chrysopal

A visual guide to the evolution and character of chrysopal.
15

MINERAL ARTICLE

Garnet

An illustrated mineral feature about the garnet group.
16

MINERAL ARTICLE

Ode to Rocks

A celebration of rocks, minerals and the stories they carry.
17

MINERAL ARTICLE

Siderite

An illustrated mineral feature about siderite.
18

MINERAL ARTICLE

Spirit Quartz

An illustrated mineral feature about spirit quartz.
19

MINERAL ARTICLE

The Lore of Pixiu

The origin, appearance and traditional symbolism of Pixiu, the heavenly wealth protector.
20

MINERAL ARTICLE

Why Do New Mineral Names Often End in -ite?

Ending a newly discovered mineral name in “-ite” follows modern mineral-naming convention before approval. Very old, well-established mineral names account for many of the fam…
21

MINERAL ARTICLE

Arfvedsonite vs. Astrophyllite

Arfvedsonite is known for a blue flash, while astrophyllite is recognized for its gold flash.
22

MINERAL ARTICLE

Dragon Blood Stone Is Not Jasper

Dragon Blood Stone is not jasper. It is chalcedony with green epidote and red to deep-green piemontite, minerals containing combinations of manganese, aluminum and silicon.
23

MINERAL ARTICLE

1. The difference between Agate vs Chalcedony

Chalcedony and agate are made of the same stuff. But it’s the way their crystals are put together that sets them apart. Chalcedony has a structure that’s like a big blanket ma…
24

MINERAL ARTICLE

Agate

Agate is a translucent variety of microcrystalline quartz. It is the name given to numerous varieties of banded Chalcedony, a mineral of the Quartz family. Its name comes from…
25

MINERAL ARTICLE

Agates (Moss,Tree vs Banded)

Agate, Moss Agate & Tree Agateorite – Black Rose (Understanding the Differences Between True Agates and Dendritic Chalcedonies) BlackAgate is a variety of chalcedony, a microc…
26

MINERAL ARTICLE

Amethyst Locations

Amethyst, a variety of quartz, exhibits differences in color, clarity, and crystal structure depending on its geological location. These variations are due to differences in t…
27

MINERAL ARTICLE

Ammonite Madagascar (Goat Horn Douvilleiceras mammillatum +Cleoniceras)

Ammonite (Goat Horn) Douvilleiceras mammillatum 125 mya to 109 mya from Madagascar The intricate suturing pattern provided strength to the ammonite. The linear structure evide…
28

MINERAL ARTICLE

Ammonites belong to the extinct subclass Ammonoidea

Ammonites belong to the extinct subclass Ammonoidea, marine mollusks related to modern squid, octopus, and the Nautilus. They first evolved roughly 409 million years ago durin…
29

MINERAL ARTICLE

CHOCOLATE CALCITE (Pakistan vs Hunan)

Chocolate Calcite is not a formal mineral species but a trade name applied to different varieties of calcite with similar coloring — so their appearance can vary greatly betwe…
30

MINERAL ARTICLE

Epidote Different Locations

Epidote – Why so different? All epidote has essentially the same chemistry, but the Earth's conditions act like different recipes. Change the amount of space, growth rate, tem…
31

MINERAL ARTICLE

Pyrite Variations

On this live, we have specimens demonstrating hydrothermal pyrite with quartz, pyrite with fluorite, iridescent/tarnished pyrite, crystalline aggregates, and sedimentary/diage…
32

MINERAL ARTICLE

Quartz is one of the most abundant minerals on Earth

Quartz is one of the most abundant minerals on Earth, and its many color variations arise from different trace elements, structural defects, and radiation. I'll break down the…
33

MINERAL ARTICLE

Quartz Overview

Quartz is one of Earth's most abundant and widespread minerals, composed of silicon dioxide (SiO₂). It forms in an extraordinary range of geological environments: crystallizin…
34

MINERAL ARTICLE

STONES OF ANCIENT EGYPT

1. Lapis Lazuli (with Lazurite) Long before the pyramids cast their shadows across the desert, the pharaohs of Egypt dreamed in deep blue. This blue was not of the Nile nor th…