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Entry № 001

Amethyst

Silicon Dioxide, Fe-bearing

The stone of tempered clarity.

Chakra

Third Eye · Crown

Element

Air

Zodiac

Pisces · Aquarius

Amethyst

I. The Metaphysical Reading

How the stone has been held.

Long associated with sobriety, discernment, and quiet insight. Traditional lithotherapy places amethyst at the crown, where it is said to still an overactive mind and support restorative sleep. Greek etymology (a-methystos, 'not intoxicated') reflects centuries of use as a stone of measured thought.

Chakra
Third Eye · Crown
Element
Air
Zodiac
Pisces · Aquarius
Keynote
The stone of tempered clarity.

II. The Scientific Reading

What the lattice actually does.

Amethyst is the violet variety of macrocrystalline quartz. Its color originates from trace ferric iron (Fe³⁺) that has been altered by natural gamma radiation, producing a color center within the SiO₂ lattice. Prolonged heating above 300–400 °C converts amethyst to citrine, demonstrating the reversibility of the color center.

Formula
SiO₂
System
Trigonal (α-quartz)
Hardness
7 (Mohs)
Provenance
Brazil, Uruguay, Zambia, Russia

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
SiO₂
Crystal System
Trigonal (α-quartz)
Mohs Hardness
7 (Mohs)
Density
2.65 g/cm³
Refractive Index
1.544 – 1.553
Provenance
Brazil, Uruguay, Zambia, Russia
Color Origin
Violet - from Fe³⁺ substitution and γ-irradiation

Related Crystals

Stones that share this lattice

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