Clear Quartz.
Quartz (silica)
The most abundant crystal on earth and the one most traditions treat as a generalist. Used to amplify intention, clarify thinking, and pair with almost any other stone.

Quick facts11ShowHide
- ChakraCrown (Sahasrara), all chakras
- Mohs hardness7
- Mineral familyQuartz (silica)
- OriginBrazil, Arkansas, Madagascar, Switzerland
- ColourColourless to milky white
- ElementAll
- ZodiacAll
- Sits well withAmplification, clarity, pairing with other stones
- Water safeYes
- Sun safeYes
- RarityVery common
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Clear quartz is colourless silicon dioxide and the most abundant single mineral by mass on earth. The same crystal structure underpins amethyst, citrine, smoky quartz, and rose quartz. They are all quartz with different traces.
Across traditions it is the generalist stone: amplifier, clarifier, companion. If you only own one piece, this is the one most teachers will start you on.