What Kind of Crystal Beads Are These?

Most crystal beads on bracelets are quartz varieties — clear quartz, amethyst, rose quartz, citrine — or softer minerals like moonstone and fluorite. Each mineral has a fixed hardness, density, and internal structure that glass and plastic cannot replicate, and a few at-home checks will sort real stone from imitation without lab equipment.

Last updated: September 12, 2026

By Mara Ellison · Founding Editor, Dusk & Relic Journal

Why Do So Many Bracelet Beads Look the Same?

Most bracelet beads on the market are quartz. Clear quartz, amethyst, citrine, and rose quartz share the same mineral structure and a Mohs hardness of 7. The visible difference between these varieties comes from trace elements or heat exposure that shift the color — a clear bead and a purple bead can both be quartz, or both be glass.

The difference between real stone and imitation is always internal. The USGS lists glass, plastics, and other materials as common substitutes for natural gemstones. U.S. net import reliance for gemstones ran at 99% of apparent consumption every year from 2021 through 2025, so most bracelet beads pass through supply chains long enough for substitution to go unnoticed.

Can a Scratch Test Tell You What a Bead Is?

A scratch test is the fastest single check for the quartz family. Clear quartz and citrine both sit at Mohs 7 — hard enough to scratch a glass plate and walk away unmarked. Any bead that cannot scratch glass is not clear quartz, amethyst, rose quartz, or citrine.

Result	What it means
Bead scratches glass, bead unmarked	Bead is at least Mohs 7 — consistent with quartz
Bead does not scratch glass	Not quartz; could be a softer real mineral or glass
Both surfaces marked	Inconclusive — try a fresh spot

The test has a blind spot. Not every crystal bracelet bead is quartz — softer minerals will not scratch glass either. A failed scratch test means "not quartz," not "not real."

What Should Real Quartz Look Like Inside?

Real quartz contains internal features that glass almost never replicates. The International Gem Society records natural clear quartz inclusions as color zoning, two- and three-phase inclusions, and negative crystals — tiny geometric voids trapped during crystal growth. These features are irregular and different in every bead.

Glass beads tend toward round air bubbles or uniform clarity. One Reddit buyer described "gossamer spiderwebish" structures inside a bead and asked whether the bead was quartz or glass — those wispy internal features are consistent with natural quartz. Bubbles point to glass; veils and geometric voids point to stone.

Gold rutilated quartz takes identification further — the golden rutile needles running through each bead are visible without magnification. Golden Thread (10.5mm, $115) shows rutile needles at that bead size, making rutilated quartz one of the easiest bead types to authenticate by sight. For smaller or less distinctive beads, telling whether a bracelet's beads are glass or real crystal relies on the same inclusion patterns under magnification.

Does a Bracelet's Weight Tell You Anything?

Quartz has a specific gravity of 2.651 — a constant whether the stone is clear, yellow, or purple. Moonstone is lighter at 2.56–2.59. Holding two bracelets of similar bead count and comparing heft is a crude but useful check.

Mineral	Mohs hardness	Specific gravity
Clear quartz	7	2.651
Citrine	7	2.651
Moonstone	—	2.56–2.59

I'd start with 9mm beads or larger for hands-on practice, because density and inclusion differences become obvious at that size. Clear Water (9mm, $90) in chunky clear quartz nuggets makes both weight and inclusions easy to evaluate. Once the feel of real quartz is familiar, pinpointing each mineral on a multi-stone bracelet gets easier.

How Do You Spot Heat-Treated Citrine?

Heat sensitivity is the distinguishing clue. The International Gem Society notes that heat-treated citrine may fade when re-exposed to heat. Natural citrine is not flagged for heat-induced fading, so a citrine bead that loses saturation after prolonged sun or heat exposure is likely heat-treated.

Both natural and heated citrine register the same hardness of 7 and the same specific gravity of 2.651 — no scratch or weight test will separate natural citrine from heated citrine. Verifying whether citrine is genuinely unheated matters for collectors and gift purchases; for daily bracelet wear, the durability is identical.

Sunstruck (8mm, $115) pairs citrine and lemon quartz nuggets with clear quartz beads on one strand — the color contrast between raw citrine nuggets and polished clear quartz teaches the visual difference between two quartz varieties by direct comparison.

Which Crystal Beads Are Hardest to Spot-Check?

Clear quartz is the trickiest. The refractive index of clear quartz is 1.544–1.553 according to the International Gem Society, close enough to common glass that optical appearance alone will not separate clear quartz from glass. Scratch and density remain the reliable checks for clear beads.

Moonstone is one of the most commonly imitated bracelet stones. Real moonstone has perfect and easy cleavage in two directions, meaning moonstone chips more readily than quartz on impact. A "moonstone" bead that has survived repeated hard knocks without surface marks deserves closer inspection.

Smaller bead sizes make every test harder. First Frost (8mm, $105) in faceted clear quartz is large enough to show inclusion detail under a phone macro lens, while Silver Lining (7mm, $115) in faceted clear quartz sits at the threshold where a loupe becomes necessary for reliable inspection.

FAQ

Can I use a lighter or hot water to test crystal beads?

Heat testing risks damage. Heat-treated citrine may fade when re-exposed to heat, and moonstone has perfect cleavage in two directions, making moonstone vulnerable to thermal shock. Scratch and weight tests are safer starting points.

Are all clear beads on a bracelet the same type of quartz?

Not necessarily. Clear quartz and pale citrine can appear nearly identical in small bead sizes. Specific gravity across the quartz family is constant at 2.651, so weight will not separate quartz varieties from each other — only from non-quartz materials.

Why would anyone sell fake rose quartz when real quartz is cheap?

The USGS lists glass and plastics as standard substitutes for natural gemstones, even inexpensive ones like quartz. At bracelet volumes, the per-bead cost difference between molding glass and cutting real stone adds up.

Do rainbow cracks inside a bead mean the stone is natural?

Rainbow fractures are a positive sign but not conclusive on their own. The International Gem Society identifies several types of natural quartz inclusions — color zoning and negative crystals among them — that glass does not form. Pair any visual check with a scratch test for a more reliable result.

Will moonstone beads chip if I wear the bracelet every day?

Moonstone has perfect and easy cleavage in two directions, so moonstone chips more easily than quartz on impact. Removing a moonstone bracelet before gym sessions or manual work reduces that risk.

Can I use stainless steel to scratch-test my beads?

A quartz bead at Mohs 7 will scratch most household metals. Use the underside of a stainless utensil — if the bead leaves a mark on the steel and picks up no mark itself, the bead is at least quartz-hard.

How do I test beads on a bracelet with multiple stone types?

Test each bead individually. Quartz varieties — clear, amethyst, citrine, rose — all share Mohs 7 and specific gravity 2.651, so quartz beads behave identically on scratch and weight tests. Softer or lighter stones like moonstone (specific gravity 2.56–2.59) stand out by comparison.