Precious Opal Beads

Frequently asked questions

• What's the difference between precious opal and common opal?

  Precious opal shows play-of-color — the flashing spectral fire that shifts as the stone moves under light. That optical effect comes from the internal silica sphere structure diffracting light. Common opal (sometimes sold as Peruvian pink or blue opal, Andean opal, dendritic opal) is the same mineral family but lacks the ordered sphere stacking, so it shows body color only with no fire. This hub is the play-of-color material — Ethiopian Welo, Australian, and Mexican fire opal. For solid-color opal without fire, see the Common Opal collection. Opalite, also sold separately, is a manmade glass imitation and not opal at all.
• Where do precious opals come from?

  Three origins dominate the bead trade. Ethiopian Welo opal (Wollo Province) is the most common in faceted rondelle and teardrop form — light body with strong multicolor fire, typically hydrophane (see care). Australian opal — including boulder opal with host ironstone matrix and assembled doublets — runs darker body color with blue, green, and red flash. Mexican fire opal shows warm orange to red body color, sometimes with play-of-color, sometimes translucent without fire. Origin should be disclosed; ask before buying if it isn't specified, since price and durability differ meaningfully between these sources.
• How should I care for opal beads in finished jewelry?

  Opal contains structural water (3–10%) and sits at roughly 5.5–6.5 Mohs, so it's softer and more sensitive than most beadstones. Ethiopian Welo is hydrophane — it absorbs water and can temporarily lose fire or cloud until it redries. Keep opal away from ultrasonic cleaners, steam, prolonged soaking, perfume, and harsh solvents. Wipe with a soft dry cloth. Store away from harder beads that can abrade the surface. Avoid sudden temperature shifts, which can craze the stone. Designers stringing Welo should warn the end customer that brief water exposure may dim color until the bead dries.
• Are precious opals treated, and what about doublets and triplets?

  Some Ethiopian opal is sugar/smoke treated to deepen body color and contrast — the bead is soaked in sugar solution then heated, leaving carbon in the pore structure. Untreated Welo is also common. Australian boulder opal is typically untreated natural material with ironstone matrix left intact. Doublets bond a thin opal slice to a dark backing for contrast; triplets add a clear cap over that sandwich. Doublets and triplets are assembled stones, not solid opal, and react badly to water at the bond line. Treatment and construction should be disclosed; ask before buying if it isn't specified.
• Is opal really the October birthstone?

  Yes. Opal is the traditional October birthstone, paired with Tourmaline as the modern alternate — designers often build October pieces around either or combine both. For birthstone work, Ethiopian Welo gives the broadest color flash at the most accessible price point, Mexican fire opal suits warm-palette designs, and Australian boulder reads more earthy with matrix. Watch for size and drill specs: precious opal often comes in smaller calibrated rondelles (3mm, 5mm, 6mm, 8mm) and teardrops rather than large rounds, since rough yields favor smaller cut beads. Size and drill should be disclosed.