rockSedimentary

Coal

Coal is a black or brownish-black sedimentary rock formed from ancient plant remains, primarily used as a fuel source.

Quick Facts

Key properties and characteristics

Category

rock

Family

Sedimentary

Colors

black, brown, dark gray

Hardness

? Mohs

Luster

dull to submetallic

Transparency

opaque

Found In

India, China, United States

Stone DNA

Property breakdown

Hardness
Mohs scale: 5
5.0/10
Durability
Resistance to wear
5.0/10
Luster
dull to submetallic
5.0/10
Rarity
common
2.0/10
Density
2.5 g/cm³
5.0/10

Scores normalized to 10-point scale for comparison

Color Spectrum

Natural color variations

black
brown
dark gray
blackbrowndark gray

Origin Highlights

Where this stone is found

common
🇮🇳
IndiaPrimary
🇨🇳
China
🇺🇸
United States
🇦🇺
Australia
🇷🇺
Russia

+1 more locations

Crystal Structure

Molecular arrangement

Interlocking Crystalline

Multiple crystals fused together in matrix

GraniteMarbleGneissQuartzite

Geology Deep Dive

Formation & composition

Formation

Coal forms from the compaction and alteration of plant material in swampy environments over millions of years, undergoing peat, lignite, bituminous, and anthracite stages.

🏔️

Surface / Shallow burial

0-5 km below surface

Mineral Composition

Mostly carbon
with varying amounts of hydrogen
sulfur
oxygen
and nitrogen
Formation Timeline: Thousands to millions of years

Rashi & Planetary Match

Vedic astrology compatibility

💎
Birth Month: Not a traditional birthstone

Uses by Industry

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Commonly Confused With

How to tell them apart

🆚
Jetvs Coal

Similar appearance

🆚
Obsidianvs Coal

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🆚
Shalevs Coal

Similar appearance

Always verify with hardness test or expert examination

Formation & Geology

Coal forms through geological processes over millions of years. The unique conditions of temperature and pressure create its distinctive characteristics and crystal structure.

Understanding the geological origins helps appreciate the rarity and natural beauty of this stone.

Uses & Applications

Spiritual & Healing

Coal, though not a traditional spiritual stone, represents transformation—turning ancient plant life into a powerful energy source. In some folk traditions, coal is seen as a symbol of grounding and resilience, reminding us of the hidden potential within humble beginnings. Its deep black color is sometimes associated with protection and absorbing negativity, though these uses are rare and not part of mainstream Vedic astrology or crystal healing. Most spiritual associations with coal are metaphorical, focusing on its journey from plant to rock and its role in human progress.

Affirmations

"I am resilient and grounded."

"I transform challenges into strength."

Rituals & Practices

  • Rarely used in rituals; sometimes placed in homes for grounding energy or as a symbol of transformation.

The information provided is for educational purposes only and not intended as medical advice. Consult a qualified professional for health-related questions.

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Data
Images
1 months ago

Stone data enriched using AI with gemology and Vedic astrology sources. Always verify with certified experts for important decisions.