Crystopedia
IMA mineral species Healing crystal

Corundum

Al₂O₃

Oxide mineral.

RedOrangeYellowGoldGreenBluePurplePinkBrownGrayWhite & Clear

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

Properties

Chemical formulaAl₂O₃
ElementsAl, O
Crystal systemTrigonal
Mohs hardness9
Density—
Streakwhite
Color—
Fractureconchoidal fracture
IMA symbolCrn
Nickel–Strunz class4.CB.05

“—” 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.

Varieties & related stones

✨ 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.

The mineral behind ruby and sapphire, associated with steadfastness.

Traditional uses
steadfastness, strength, focus
Chakra
Root Third Eye
Zodiac
Virgo
Element
Earth

💞 Pairs well with (traditional pairings)

HematitePaired in tradition for focus, with Hematite bringing grounding as well. Tiger's EyeBoth carry the theme of focus, so together they're thought to reinforce it. SapphireA natural partner for focus; Sapphire also adds wisdom. AgateWorks the same Root chakra, adding stability. Clear QuartzLifts and clarifies corundum's grounding energy; clear quartz is said to amplify any stone.

Learn more