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Onyx

Photo: Simon Eugster --Simon 14:41, 11 April 2006 (UTC) / Wikimedia Commons (CC BY-SA 3.0)

Onyx

Also known as: Black onyx

Parallel-banded chalcedony prized for cameos since antiquity – a crystal lore stone of strength and self-control.

  • ColourBlack, Black and white, Brown
  • Mineral groupChalcedony
  • ChemistrySiO₂
  • Hardness (Mohs)6.5–7
  • Crystal systemTrigonal (microcrystalline)
  • Where it's foundIndia, Brazil, Uruguay, Madagascar
  • ChakraRoot
  • ZodiacLeo, Capricorn

What is Onyx?

Onyx is chalcedony with straight, parallel bands, typically black and white. It has been carved into cameos and seals since ancient Greece and Rome, where the contrasting layers let carvers create raised designs.

Most black onyx in jewellery is dyed chalcedony or agate – a treatment practised since Roman times. Note that "Mexican onyx" or "onyx marble" is a different material: banded calcite. The name comes from the Greek onyx, "fingernail".

Onyx astrology & birthstone

  • Zodiac signsLeo, Capricorn
  • Ruling planetSaturn
  • ElementEarth
  • Birthstone month—

Zodiac, planet and element links come from crystal-lore traditions and vary between authors. Birthstone months follow the American Gem Society list.

Onyx meaning & traditional properties

Onyx is associated with strength, self-control and protection in crystal traditions.

  • Strength
  • Protection
  • Self-control

Traditional and metaphysical properties are shared for cultural and educational interest. Crystals are not a substitute for medical advice or treatment.

How to use Onyx

  • Wear black onyx jewellery for a classic, grounded look.
  • Keep a piece on your desk during demanding projects.

How to care for Onyx

Durable. Clean with warm soapy water.

Shop Onyx

Hand-picked onyx crystals and jewellery from our Paralimni workshop.

Rituals & pairings

Pair Onyx with a protection & cleansing ritual

A traditional cleansing ritual for resetting your space and feeling protected.

Traditionally paired with: White sage or palo santo smudge sticks · Dragon's blood, frankincense or myrrh incense · A white or black candle

  • Open a window, then light a white sage or palo santo stick and let it smoulder.
  • Gently waft the smoke around your crystal and through the room, corners first.
  • Light a white candle and place your crystal beside it while you set a simple intention, such as "This space is calm and protected".
  • Finish with frankincense or dragon's blood incense and let it burn down safely.

Safety: never leave candles, incense or smudge sticks burning unattended, keep them away from children, pets and anything flammable, and ventilate the room. Rituals are shared as tradition, not as a treatment.

Ritual oils, essential oils & perfumes

Deepen your practice: tarot & oracle cards

Wear it & work with it

Onyx jewellery & pendulums

Onyx FAQs

Is black onyx natural?

Most black onyx is dyed chalcedony – a very old, stable treatment.

What does onyx mean?

It comes from the Greek word for fingernail.

Related crystals

  • Sardonyx

    Sardonyx

    Banded chalcedony in layers of red-brown sard and white onyx – an August birthstone carved into Roman seals...

  • Black Obsidian
    In our shop

    Black Obsidian

    Natural volcanic glass with razor-sharp edges – a classic protective, grounding stone.

  • Agate
    In our shop

    Agate

    Banded chalcedony formed layer by layer inside volcanic cavities – a classic grounding and balancing stone.

  • Chalcedony
    In our shop

    Chalcedony

    The soft-glowing microcrystalline quartz behind agate, carnelian and onyx – a stone of calm communication.

Sources