Crystopedia
Mineral variety Healing crystal

Onyx

SiO₂

Banded variety of the mineral chalcedony.

Black

Variety of Chalcedony.

Onyx specimen
Onyx.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formulaSiO₂
ElementsSi, O
Crystal systemTrigonal
Mohs hardness7
Density2.65 – 2.667 g/cm³
Streak—
Color—

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

🌍 Where it's found

  • Type locality
  • Notable source / deposit
  • Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.

✨ Metaphysical & Folklore

These are traditional and folk beliefs from crystal lore. They are not scientific or medical claims – crystals are not a substitute for professional care.

Black onyx is associated with self-control, resilience and absorbing negativity.

Traditional uses
discipline, protection, grounding
Chakra
Root
Zodiac
Leo, Capricorn
Element
Earth, Fire

💞 Pairs well with (traditional pairings)

Black TourmalineA natural partner for protection; Black Tourmaline also adds grounding. ShungitePaired in tradition for protection, with Shungite bringing purification as well. Smoky QuartzBoth carry the theme of grounding, so together they're thought to reinforce it. HematiteA natural partner for grounding; Hematite also adds focus. Clear QuartzLifts and clarifies onyx's grounding energy; clear quartz is said to amplify any stone.

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