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Are These Real Amethyst and Clear Quartz Beads?
Sources give no color test for amethyst or clear quartz beads. IGS lists amethyst RI 1.544–1.553 and SG 2.651; no clear quartz figures given.
The sources behind this article give no color, feel or home test that confirms whether beads are real amethyst or clear quartz. For amethyst, the International Gem Society lists a refractive index of 1.544–1.553 and a specific gravity of 2.651, which a gem lab reading can be compared against, but these sources give no matching figures for clear quartz.
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What can each common check tell you about amethyst and clear quartz?
The only identity-related figures these sources give are amethyst's refractive index and specific gravity. They do not present color, flame tests or scratch resistance as identity tests. The table below shows what the sources supply for each check.
| Check | What the sources give for amethyst | What the sources give for clear quartz |
|---|---|---|
| Refractive index (gem lab reading) | 1.544–1.553 (International Gem Society), a published range a reading can be compared against | No figure in these sources |
| Specific gravity (gem lab reading) | 2.651 (International Gem Society), a published value a reading can be compared against | No figure in these sources |
| Purple color | No color standard given | Not applicable |
| Colorless, glassy look | Not applicable | No visual standard given |
| Lighter or flame test | Not described as an identity test. IGS reports amethyst may discolor at 400–500 °C | Not covered |
| Scratch resistance | Mohs 7 (GIA). The scale compares scratch resistance, not breakage | Not covered |
| Seller's written material list | A stated claim, not lab proof | Same |
Amethyst Tide · $105. View this piece’s details →
What do the published numbers for amethyst tell a buyer?
The published numbers for amethyst give a lab something concrete to compare a bead against. The International Gem Society lists amethyst's refractive index as 1.544–1.553 and its specific gravity as 2.651. Both come from the International Gem Society amethyst guide.
GIA gives amethyst a Mohs hardness of 7 and describes its toughness as good. GIA also states that the Mohs scale compares resistance to scratching and does not measure resistance to breakage. A hardness of 7 therefore describes scratch resistance. It does not measure whether a bead will survive a drop.
These figures do not include a color standard. A purple bead that looks right is still unmeasured.
What do these sources say about clear quartz?
The sources behind this article do not list separate refractive index, density or hardness figures for clear quartz. That is a real gap. This article will not borrow the amethyst numbers and relabel them as clear quartz data.
The one quartz-related fact available comes from GIA. GIA's amethyst care page notes that quartz is a major component of ordinary sand and dust, so amethyst still needs care against scratches.
When a bracelet mixes purple and colorless beads, the practical question is often which bead is which. That comparison is covered in telling amethyst beads from clear quartz beads on the same strand.
What do these sources say about heating amethyst?
These sources do not describe a lighter or flame test, so they give no support for using one to check identity. They do give heat warnings. The International Gem Society reports that amethyst may discolor at 400–500 °C, and GIA warns that sudden temperature shifts can fracture amethyst.
GIA's cleaning guidance points the same way. GIA recommends warm water with soap for amethyst and advises against steam and heat.
Can you tell at home whether amethyst is heat treated or dyed?
These sources give no home method for detecting heat treatment or dye in amethyst. GIA's cleaning guidance does mention dyed and fracture-filled stones, and it qualifies ultrasonic cleaning for them.
For what treatment questions a lab can answer, see how heat treatment in amethyst is identified.
The listings reviewed here name the material but do not state treatment status. For example, the listing for Amethyst Tide (8mm, tumbled amethyst chips, $105) states the stone and its form. It does not state treatment status.
What should a seller's listing tell you about amethyst and clear quartz?
A seller's listing should name each stone in writing. A written material list is a stated claim about the materials, not lab proof, and price is not proof either. The limits of price as evidence are covered in whether a bracelet's price says anything about real amethyst.
One Dusk & Relic mixed strand shows how a full list reads. Happiness Is (11mm, $95) lists amethyst and clear quartz by name among eight stones, along with .925 sterling silver.
A single-stone listing can also name the cut. Lilac Hour (13mm, $115) is listed as light, faceted amethyst nugget with .925 sterling silver.
Does amethyst care advice cover the rest of the bracelet?
Amethyst care advice covers the amethyst only. GIA's cleaning statements apply to the mineral. GIA's own guidance does not establish the safety of a bracelet's cord or other components.
That matters for mixed pieces. Bolivian Dusk (11.5mm, $165) is listed with Bolivian amethyst, freshwater pearl and 18k gold-plated hardware. Warm water and soap is GIA's advice for the amethyst. It is not a statement about the pearls or the plating.
GIA also warns that sustained intense light may fade the color of some amethyst specimens. That warning is about the stone's color, not about whether the stone is genuine.
FAQ
Does a Mohs hardness of 7 mean an amethyst bracelet won't break?
No. GIA gives amethyst a Mohs hardness of 7, and GIA states that the Mohs scale compares resistance to scratching. The scale does not measure resistance to breakage. GIA separately describes amethyst's toughness as good.
Can ordinary dust scratch amethyst beads?
GIA notes that quartz is a major component of ordinary sand and dust, so amethyst still needs care against scratches. Hardness does not make amethyst immune to dust.
Is steam or hot water safe for cleaning amethyst?
GIA recommends warm water with soap for amethyst and advises against steam and heat. GIA also warns that sudden temperature shifts can fracture amethyst.
Is ultrasonic cleaning safe for amethyst beads?
GIA qualifies ultrasonic cleaning for dyed or fracture-filled amethyst. A buyer who does not know whether a bead is dyed or fracture-filled does not have the information GIA's guidance depends on.
Can strong light fade real amethyst?
GIA warns that sustained intense light may fade the color of some amethyst specimens. Fading therefore does not by itself show that a bead is fake.
