Eye check vs measured numbers: which is better for knowing if I'm being scammed buying crystal bracelets?

The supplied evidence does not establish that measured numbers are better than an eye check for detecting a crystal-bracelet scam. The rule to remember is: treat appearances and matching reference numbers as clues, not proof.

Last updated: October 3, 2026

By Mara Ellison · Founding Editor, Dusk & Relic Journal

Eye check or measured numbers: what can you compare?

Criterion	Eye check	Measured numbers
Available reference for rock crystal	Listed natural inclusions include color zoning and negative crystals	Specific gravity 2.651; refractive index 1.544–1.553
Does a match prove authenticity?	The supplied evidence does not establish this	A match is consistent with the quartz reference values, not confirmation of identity
Distinguishing citrine from clear quartz	No visual identification method is established here	Their listed specific gravity and refractive index are identical
Identifying citrine heat treatment	No method is established here	The listed figures do not establish treatment status

Neither column supplies a conclusive authenticity test. The USGS Mineral Commodity Summaries lists glass, plastics and other materials as substitutes for natural gemstones and notes that simulants are frequently substituted for natural gemstones. That establishes a reason for caution, not a ranking of inspection methods.

Violet Mist · $90. View this piece’s details →

What can an eye check tell you?

The supplied evidence gives examples of natural inclusions, not a visual test that proves a bracelet is genuine. The International Gem Society lists color zoning and negative crystals among natural inclusions in rock crystal.

Remember the governing rule: appearances are clues, not proof. Related buyer questions are covered in whether a home check or a lab test is better for a snowflake obsidian bracelet and what to do when an amazonite bead doesn't look like amazonite.

Ask for the exact material names before choosing a reference to consult. Violet Mist, for example, lists Purple Phantom Quartz (Super Seven). That is a seller's material description, not an independent identification.

What do measured numbers tell you?

Measured numbers can be compared with published reference values, but a match does not establish identity. The International Gem Society gives rock crystal a specific gravity of 2.651, described as very constant, and a refractive index of 1.544–1.553. These are mineral reference values, not measurements of any bracelet featured here.

Frost & Fortune lists Green Phantom Quartz and Clear Quartz. No measurements of its beads are supplied, so its listing should not be presented as verification that the beads match the rock crystal figures.

What exceptions and limits should you remember?

The rule has no shortcut in the supplied evidence: shared values, treatment questions and mixed materials all limit what a comparison can establish.

Citrine and clear quartz share the listed values. The International Gem Society gives citrine a specific gravity of 2.651 and a refractive index of 1.544–1.553, identical to the clear quartz references. A matching reading therefore cannot distinguish these varieties and does not by itself confirm quartz identity. For a related buyer question, see how to tell whether carnelian and citrine beads are real.

Treatment is a separate question. The International Gem Society notes that heat-treated citrine may fade when exposed to heat; the reference figures supplied here do not establish whether a bead was heat-treated.

Mixed-material listings also exceed the scope of these references. Tide Chime lists aquamarine and natural freshwater pearl. French Spring lists quartz varieties alongside cinnabar and a carved wood flower. The supplied evidence gives no reference figures for aquamarine, pearl, cinnabar or wood.

Which approach should you choose?

Choose according to the question you want to investigate, not a promise that either approach will settle authenticity. These are suggested starting points, not verified test results for the products.

Choose an eye check if you want to review a listing's appearance and material description; the in-stock Violet Mist is listed as Purple Phantom Quartz (Super Seven). Choose measured-number comparison if you want to compare a reported reading with the clear quartz references; the in-stock Frost & Fortune and Moss Garden both list Clear Quartz among their materials, but neither has bead measurements supplied here. In either branch, treat the result as a clue, not proof.

FAQ

Can specific gravity tell citrine apart from clear quartz?

Not from these reference values. The International Gem Society lists a specific gravity of 2.651 for both citrine and clear quartz, and the same refractive index of 1.544–1.553. A match is consistent with those references but does not confirm quartz identity or distinguish the varieties.

Will heat-treated citrine change color?

It can. The International Gem Society notes that heat-treated citrine may fade when exposed to heat.

Are plastic beads ever sold in place of real gemstones?

The USGS lists plastics, along with glass and other materials, as substitutes for natural gemstones. The same report notes that simulants are frequently substituted for natural gemstones.

What should I ask a crystal seller before buying?

Ask for the exact material names on the strand so you can look for relevant references. Keep the seller's description separate from evidence verifying the actual beads.