Crystal Encyclopedia

Choose a letter, pick a stone from the list, and read about it: what it is made of, how hard it is, what it looks like, what it has traditionally been said to do, and how to look after it.

450 minerals

Black Quartz

The Midnight Cleanser

Also known as: Morion Quartz

About the stone

Black Quartz crystal
Photo: Parent Géry, Public domain, via Wikimedia Commons

Black quartz commonly refers to morion, the darkest variety of smoky quartz, whose nearly black color results from radiation acting on traces of aluminum within its crystal structure. Known since antiquity, it has no single recorded discoverer; the name “morion” traces to mormorion, a stone described by Pliny the Elder in his first-century Natural History. Notable sources include the Swiss Alps, Brazil’s Minas Gerais region, Ukraine, and Colorado. In modern crystal lore, morion symbolizes grounding, protection, and emotional stability.

Mineral data

  • Chemical composition: Quartz, SiO2, a framework silicate colored very dark by trace aluminum in the crystal structure and natural radiation. It is the darkest variety of smoky quartz.
  • Hardness: 7 on the Mohs scale.
  • Color: Black, translucent at thin edges.
  • Specific gravity: 2.6-2.7 g/cm3
  • Refractive index: 1.544-1.553

Metaphysical data

Black Quartz, recognized for its deep, dark clarity and strong protective qualities, has been utilized in metaphysical practices to cleanse spaces, shield the aura, and ground the spirit in the Earth.

Protective Energy

  • Black Quartz is believed to protect against negative energies, psychic attacks, and dark entities, acting as a deep dark shield around the aura.
  • It is thought to be a perfect crystal for cleansing a healing or meditation room, keeping the space clear, calm, and purified.

Emotional Healing

  • Black Quartz is believed to clear and expand the aura, raising vibrations so the body can better attune to the full spectrum of light energy.
  • It is thought to support a feeling of calm clearing, as heavy or lingering feelings are released into the stone's steady, dark depths.

Harmonizing Energy Centers

  • Black Quartz is associated with the root chakra, where it is believed to anchor a person firmly to the Earth and bring a strong sense of stability.
  • It is said to stimulate clairaudient abilities and to exude the sacred Om sound when placed over the third eye.

Zodiac Associations

  • Black Quartz is associated with all zodiac signs, offering protection and cleansing to people of every birth date.
  • It vibrates to the number 6, linked with harmony, balance, and caring for one's surroundings, fitting its role in purifying a space.

Spiritual Growth

  • Black Quartz is thought to harmonise the higher vibrational energies of the aura, light body, or subtle body, supporting healing at the spiritual level.
  • Its strong grounding and cleansing nature makes it a favorite in meditation spaces, where it helps keep the mind quiet and focused.

Physical Healing

  • While not a substitute for professional medical advice, Black Quartz is traditionally said to assist when treating diseases of the nervous system.
  • Tradition also says it can stimulate healing of any dis-ease by harmonizing subtle energies, always as a complement to proper medical care.

Care and handling

Black Quartz is durable, with a hardness of 7. Clean it with lukewarm water, mild soap, and a soft cloth. Smoky and black quartz can lighten with prolonged strong sunlight or high heat, so keep it out of direct sun and away from heat sources. Avoid sudden temperature changes and harsh chemicals. Because true black quartz is rare, buy it from a trusted seller.

Individual experiences with Black Quartz vary, and its effects are personal. Use it mindfully to cleanse and protect your space, and let it ground you.