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Entry № 306

Orca Agate

Banded chalcedony

Black-and-white bands that echo the ocean's diplomat.

Chakra

Root · Throat

Element

Water · Earth

Zodiac

Pisces · Gemini

Orca Agate

I. The Metaphysical Reading

How the stone has been held.

Orca agate is worked with as a stone of balance, communication and emotional depth. Its dramatic contrast is read as a reminder that light and shadow can coexist gracefully, supporting honest expression during difficult conversations.

Chakra
Root · Throat
Element
Water · Earth
Zodiac
Pisces · Gemini
Keynote
Black-and-white bands that echo the ocean's diplomat.

II. The Scientific Reading

What the lattice actually does.

Orca agate is a trade name for a strikingly banded agate whose alternating black and white layers are microcrystalline quartz precipitated in cavities within volcanic rocks. The black bands are typically colored by manganese or iron oxides, while the white bands are relatively pure silica.

Formula
SiO₂
System
Trigonal (microcrystalline)
Hardness
6.5 – 7 (Mohs)
Provenance
Madagascar, India, Brazil

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
SiO₂
Crystal System
Trigonal (microcrystalline)
Mohs Hardness
6.5 – 7 (Mohs)
Density
2.58 – 2.64 g/cm³
Refractive Index
1.530 – 1.540
Provenance
Madagascar, India, Brazil
Color Origin
Bold black and white banding, sometimes with grey

Related Crystals

Stones that share this lattice

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Orchid Calcite

Soft floral layers for the heart's patience.