Frequently asked questions

• Is chalcedony the same as agate, carnelian, or onyx?

  All four are the same mineral — cryptocrystalline silica, an intergrowth of quartz and moganite. The trade names describe appearance, not composition. "Chalcedony" in the bead trade usually means the translucent, evenly-colored material (often blue, gray, lavender, or white) without the banding that defines agate, the orange-red of carnelian, or the solid black of onyx. Chrysoprase is nickel-colored green chalcedony. Because they share mineralogy, they share Mohs 6.5–7 hardness and the same care profile, which makes mixing them in a single design straightforward from a durability standpoint.
• Is the color natural or dyed on chalcedony strands?

  Both occur in the trade. Natural chalcedony ranges from milky white to soft gray, blue-gray (often called "blue chalcedony"), lavender, and pale yellow depending on origin. Vivid or saturated colors — strong aqua-blue, hot pink, deep purple — are typically dyed, since chalcedony's porosity takes color well. Treatment should be disclosed; ask before buying if it isn't specified. Dyed material is stable for normal wear but can fade with prolonged UV exposure or harsh solvents, so store finished pieces out of direct sunlight and clean with mild soap rather than ultrasonic or steam.
• What jewelry projects suit chalcedony best?

  Chalcedony's translucency and soft color palette make it a strong choice for layering and bridal work where you want presence without high contrast. The rounds stocked in 6mm–10mm string well for multi-strand necklaces and stretch bracelets; teardrops and ovals work as focal drops in earrings or Y-necklaces. Larger free-form and nugget cuts (10–14mm range) carry statement pendants. Blue and lavender chalcedony pair cleanly with sterling and white gold; warmer natural tones bridge to brass, bronze, and yellow gold. At Mohs 6.5–7 it handles bracelets, earrings, and pendants reliably.
• How durable is chalcedony for everyday wear?

  At Mohs 6.5–7, chalcedony is durable enough for daily-wear earrings, pendants, and necklaces. Bracelets are fine for normal use but will pick up scratches over years of contact with harder materials like quartz, topaz, or anything with grit. Rings are workable for occasional wear but not ideal for daily wear, since the bezel-facing surface will dull faster than harder stones. Clean with mild soap, lukewarm water, and a soft cloth. Avoid ultrasonic cleaners, steam, and prolonged solvent exposure, especially if the strand is dyed — color can migrate or fade under aggressive cleaning.
• Why do chalcedony strands vary in translucency and tone?

  Chalcedony forms as cryptocrystalline silica in volcanic and sedimentary cavities, and the conditions of formation — trace inclusions, crystal density, and host rock chemistry — drive how translucent or milky a piece reads. Namibian and Turkish material tends toward cooler blue-gray translucency; Indonesian and Brazilian deposits include warmer grays and creams; US sources contribute a range. Within a single strand you'll often see beads grading from nearly opaque to glowing semi-transparent, which is characteristic of natural material rather than a defect. Specific origin should be disclosed when known.