Crystopedia
IMA mineral species Healing crystal

Opal

SiO₂·nH₂O

Silica mineraloid.

RedOrangeYellowGreenTealBluePurplePinkBrownBlackWhite & ClearMulticolor & Iridescent

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

Properties

Chemical formulaSiO₂·nH₂O
ElementsSi, O, H
Crystal system—
Mohs hardness—
Density—
Streakwhite
Color—
IMA symbolOpl
Nickel–Strunz class4.DA.10

“—” 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.

✨ Opal family

Black Opal
Black OpalMineral variety
Blue Opal
Blue OpalMineral variety
Boulder Opal
Boulder OpalMineral variety
Chocolate Opal
Chocolate OpalMineral variety
Common Opal
Common OpalMineral variety
Crystal Opal
Crystal OpalMineral variety
Dendritic Opal
Dendritic OpalMineral variety
Ethiopian Opal
Ethiopian OpalMineral variety
Fire opal
Fire opalMineral variety
Green Opal
Green OpalMineral variety
Honey Opal
Honey OpalMineral variety
Hyalite
HyaliteMineraloid variety
Matrix Opal
Matrix OpalMineral variety
Opal Doublet & Triplet
Opal Doublet & TripletMineral variety
Opalite
OpaliteNatural glass
Opalized Fossil
Opalized FossilFossil
Pink Opal
Pink OpalMineral variety
◆
Precious opalGem material
Synthetic Opal
Synthetic OpalMineral variety
Virgin Valley Opal
Virgin Valley OpalMineral variety
White Opal
White OpalMineral variety
Wood Opal
Wood OpalMineral variety

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 play of color in opal has inspired lore of hope, creativity and emotional expression.

Traditional uses
creativity, inspiration, emotional expression
Chakra
Heart Crown
Zodiac
Libra, Cancer, Scorpio
Element
Water, Fire

💞 Pairs well with (traditional pairings)

LepidoliteAnother Heart & Crown chakra stone, used alongside opal for calm. FluoriteWorks the same Heart & Crown chakra, adding study. Blue Lace AgateBoth carry the theme of peaceful expression, so together they're thought to reinforce it. CalciteAnother Crown chakra stone, used alongside opal for energy cleansing. HematiteA grounding root stone to balance opal's high, spiritual energy.

Learn more