Four Categories, Not Two

The popular framing of stone bracelets as "real" versus "fake" collapses four meaningfully different categories into a binary that doesn't capture what's actually useful to know. A heat-treated amethyst and a glass bead are both "not natural," but they have almost nothing else in common — different chemistry, different hardness, different durability, different visual qualities. Treating them as the same category ("fake") misleads more than it informs.

Here are the four categories that actually matter, with what distinguishes each:

Category 1 — Natural Stone

Mined from the earth, no significant alteration beyond cutting and polishing.

Natural stone is exactly what it sounds like: mineral material extracted from geological deposits, cut into beads, and polished. The chemical composition, crystal structure, and physical properties are those of the mineral as it formed in the earth. Natural color, natural inclusions, natural variation between pieces.

How to identify it: Natural stones have variation. No two natural labradorite beads flash in exactly the same direction. No two natural amethyst beads have exactly the same depth of color. Absolute uniformity across every bead in a bracelet is a warning sign — it suggests either glass or synthetic.

Temperature test: Natural stone feels cold to the touch initially and warms slowly. Glass warms immediately to room temperature. Hold a bead to your cheek — natural stone feels distinctly cooler at first contact than glass of the same size.

Category 2 — Synthetic Crystal

Identical chemistry to the natural stone, grown in a laboratory.

Synthetic crystals have the same chemical composition and crystal structure as their natural counterparts — they are the same mineral, grown under controlled conditions. Synthetic amethyst is silicon dioxide with iron and aluminum impurities, just like natural amethyst. What synthetic stones lack is natural geological variation — inclusions, color zoning, growth patterns that make natural stones individual.

Is synthetic stone "fake"? By strict mineralogical definition, no — it's the same mineral. By consumer expectation in the natural stone market, it's a meaningful distinction that should be disclosed. The honest term is "synthetic" or "lab-grown," not "fake."

How to identify it: Excessive perfection. Natural stones have minor inclusions, slight color variation, microscopic surface irregularities. Synthetic stones are often too clean, too uniform, too consistent in color to be natural. Extreme visual uniformity in a stone that normally has variation is the primary indicator.

Category 3 — Glass Imitation

A completely different material shaped and colored to look like stone.

Glass imitations are the most misleading category because they're visually indistinguishable at a glance from natural stones, but are materially completely different. Colored glass beads, resin beads, and plastic beads shaped to look like stone have none of the properties of the minerals they imitate.

Common glass imitations to know:

Goldstone — often sold as "sandstone" or "aventurine." Dark glass with metallic copper or chromium sparkles. Always glassy, never a natural stone. The sparkle is metallic and highly reflective; natural aventurine's shimmer is subtler.

Dyed howlite — white porous stone dyed to imitate turquoise, lapis lazuli, or other colored stones. Cross-section of a broken bead shows white interior with color only in surface layers.

Reconstituted stone — powdered natural stone mixed with resin and pressed into bead form. Common in turquoise and malachite.

How to identify glass: Warmth and weight. Glass warms immediately to body temperature; stone remains cool longer. Glass is lighter than most stones of similar size. A scratch test on an inconspicuous area: glass scratches more easily than quartz-family stones.

Category 4 — Treated Natural Stone

Natural stone with color, clarity, or appearance enhanced by human processing.

Treated stones are natural minerals that have been processed after extraction to alter their appearance. Treatments range from completely standard and stable (heat treatment of amethyst to produce citrine) to potentially problematic (surface coating that can wear off). Most treatment is permanent and disclosed as standard practice; some is not disclosed and affects value.

Heat treatment — standard across the industry. Amethyst to citrine, tanzanite treated to produce blue color. Permanent and stable. Disclosed by reputable sellers.

Dyeing — color added to porous natural stone. Common in agate, howlite, magnesite. Can fade or transfer over time. Identifiable by color in surface pores.

Irradiation — artificial irradiation applied to produce color. Produces smoky quartz from clear quartz, blue topaz from colorless topaz. The result is chemically identical to natural color in the same stone.

Surface coating — thin metallic coating applied to stone surface ("aura" quartz). The coating is not the stone's natural property and can chip or wear over time. Identifiable by unusually uniform, metallic iridescence.

Quick Reference

How SITU Sources

All SITU bracelets use natural stones. Where standard industry treatments apply — such as heat treatment in citrine — this is noted in the product description. SITU does not use dyed stones, glass imitations, reconstituted stone, or surface-coated stones.

Natural stones vary between pieces. Two labradorite bracelets from the same batch will have different flash directions; two amethyst bracelets may differ slightly in color depth. This isn't inconsistency — it's the nature of geological material. Each piece is a specific object, not a manufactured product. The variation is the point.

Common Questions