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Entry № 310

Orthoclase

Potassium aluminium silicate

The feldspar that builds continents.

Chakra

Solar Plexus · Heart

Element

Earth

Zodiac

Virgo · Capricorn

Orthoclase

I. The Metaphysical Reading

How the stone has been held.

Orthoclase is worked with as a stone of grounded self-worth and cooperative will. As a major constituent of granite, it is read as a reminder that strength often comes from being part of a larger structure — family, community, or purpose.

Chakra
Solar Plexus · Heart
Element
Earth
Zodiac
Virgo · Capricorn
Keynote
The feldspar that builds continents.

II. The Scientific Reading

What the lattice actually does.

Orthoclase is a common potassium feldspar and one of the most abundant minerals in Earth's crust. It forms the pink or salmon crystals familiar in granites and syenites and is also found as moonstone when exsolution lamellae create adularescence.

Formula
KAlSi₃O₈
System
Monoclinic
Hardness
6 – 6.5 (Mohs)
Provenance
Madagascar, Brazil, USA, Switzerland

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
KAlSi₃O₈
Crystal System
Monoclinic
Mohs Hardness
6 – 6.5 (Mohs)
Density
2.55 – 2.63 g/cm³
Refractive Index
1.518 – 1.537
Provenance
Madagascar, Brazil, USA, Switzerland
Color Origin
Pink, salmon, white, grey, rarely green or blue

Related Crystals

Stones that share this lattice

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Next in the Atlas

Pagoda Calcite

Tiered crystal towers of quiet geometry.