Minerals
Minerals are classified according to their chemical composition and crystal structure. Below you can find the eight main mineral classes and common natural stone examples for each.
Silicates
The majority of natural stones in the world belong to this group. Silicates contain silicon (Si) and oxygen (O) in their crystal structure. Their durability, wide color range and abundance make them popular in jewelry and decoration.
Quartz
One of the most common minerals, ranging from transparent to opaque. Includes sub-varieties such as Amethyst, Citrine and Smoky Quartz.
Aventurine
Glittering due to mica or hematite inclusions; usually green in tone.
Jasper
Opaque, banded or speckled patterns; known in red, brown and green colors.
Amethyst
The purple variety of quartz; historically important in jewelry and collections.
Citrine
The yellow–orange quartz variety; valued for its bright color and clarity.
Carbonates
Carbonate minerals contain the carbonate (CO₃) ion. Their attractive patterns and colors make them prized in collections.
Malachite
Characterized by various green tones and banded appearance; often used in decorative objects.
Azurite
A deep blue mineral found in copper deposits; often associated with malachite.
Calcite
Occurs in many colors; known for its optical properties and crystal forms.
Oxides
Formed by the combination of metal ions with oxygen; some are important ores industrially.
Hematite
Metallic gray/reddish tones; rich in iron.
Magnetite
A naturally magnetic iron oxide mineral.
Spinel
Occurs in various colors; used as a gemstone in jewelry.
Phosphates
Contain the phosphate ion; relatively rare among gemstones.
Apatite
Occurs in blue, green and yellow hues; transparent specimens are cut for jewelry.
Turquoise
Known for its sky blue–turquoise color; one of the oldest and most loved ornamental stones.
Sulfates
Minerals that contain sulfur compounds; some are valued for their appearance.
Pyrite
Gold-like color, nicknamed “fool’s gold”; distinctive crystal shapes make it collectible.
Galena
A lead sulfide mineral with metallic luster; typically forms cubic crystals.
Halides
Minerals that contain halogen elements such as fluorine and chlorine.
Fluorite
Wide color range including purple, green, yellow, blue; some specimens fluoresce under UV light.
Elements
Natural minerals composed of a single chemical element.
Gold
A precious metal; widely used in jewelry and as an investment.
Silver
Known for its bright white shine and workability; used in jewelry and industry.
Copper
Used since antiquity; important for its conductivity in modern technology.
Organics
Organic-origin materials that are rarer among gemstones.
Amber
Fossilized tree resin; valued in jewelry for its warm golden and honey tones.
Frequently Asked Questions
How are minerals classified?
Main criteria are chemical composition (e.g., silicates, carbonates) and crystal structure. The eight groups on this page are the most common in mineralogy and gemology.
Which mineral group is most common in jewelry?
Silicates, especially the quartz family, are the most popular due to their durability and variety.
How can I access stone pages?
Each H3 heading links to the relevant stone page (e.g., Quartz, Amethyst, Turquoise). You can update the link paths based on your site structure.