The most useful tool in any crystal shop is not a loupe, a flashlight, or a hardness kit. It is a short list of questions, asked pleasantly, with attention paid to how the answers land. An honest seller passes this interview without noticing it happened. A dishonest one fails it in the first two minutes, and saves you from every bad purchase after that. Here are the seven questions, and what the answers should and should not sound like.

One: is this stone treated in any way?

The single most important question in the shop. Heating, dyeing, irradiation, stabilizing, and coating are all common, and a treatment is not automatically a problem. Stabilized turquoise is an honest product at an honest price. The problem is treatment sold as nature. A good answer sounds specific: this citrine is heat-treated amethyst, this turquoise is stabilized, this aura quartz is coated with titanium. A bad answer sounds offended, or vague, or arrives with the phrase all our stones are natural in a shop where the citrine glows neon orange over a snow-white base. Sellers who know their stock know its treatments. Sellers who dodge the question have already answered it.

Two: where does this stone come from?

You are testing knowledge, and honest limits to knowledge. Nobody can trace every tumbled stone to a mine, and a truthful I only know it came through our Brazilian supplier beats a suspiciously confident fairy tale. What you want to hear is familiarity: most of our amethyst is Uruguayan, this larimar is Dominican because all larimar is. What should worry you is a dramatic origin story that arrives instantly, polished, and unprompted, especially when it justifies a price. Provenance stories are the cheapest thing in the shop to manufacture.

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Three: why is this one more expensive than that one?

Point at two similar pieces and ask. An honest answer talks about the stone in front of you: deeper color, no dye, better clarity, a larger unbroken point, a scarcer locality. A worrying answer talks about anything else, and the words to listen for are energy, rarity without specifics, and any trademarked name doing the work a mineral name should do. Price built on the specimen is a price you can evaluate. Price built on a story is a price the story's author controls.

Four: can I hold it, and can I take it to the light?

This one is a permission check as much as a question, and the answer should always be an easy yes. Daylight or a bright lamp shows what display lighting is designed to hide: dye concentrated in cracks, bubbles in glass, the printed look of fake matrix. A seller reluctant to let a stone leave its carefully lit case has told you something about the case lighting. Do the standard checks while you hold it. Real sellers watch you check with approval, because your diligence flatters their stock.

Five: what is this stone, mineralogically?

Ask this whenever a stone wears a poetic or trademarked name. Every honest commercial name has a plain mineral underneath: larimar is blue pectolite, and a seller who deals in it will say so cheerfully. The failure mode is the seller who cannot, or will not, name the mineral behind the brand. If the shop does not know what it is selling, the certificate on the shelf next to it is decoration.

Six: what should I be careful about with this stone?

A quiet character test. Every stone has a vulnerability: selenite dissolves in water, amethyst fades in sun, malachite should not be soaked, soft stones scratch in a mixed pouch. An honest seller volunteers these instantly, because protecting your purchase is in their interest. A seller who insists a stone has no cautions is either inexperienced or telling you what keeps the sale moving, and both answers are worth knowing before money changes hands.

Seven: what would you buy, at this price, for this purpose?

The finisher. Tell them your budget and what the stone is for, a gift, a nightstand, a first collection, and watch which direction they point. The best sellers in this trade will walk you away from the expensive case toward a twelve-dollar piece that fits the purpose, and that walk tells you everything. You have found a shop where the advice is worth more than the inventory, and those shops deserve every dollar this site will ever send anywhere. Keep them.

The pattern in all seven

Read the list again and notice what it never asks the seller to do. It never asks them to be an academic, to certify anything, or to know the unknowable. It only asks them to be straight about treatments, honest about limits, specific about prices, relaxed about scrutiny, plain about names, forthcoming about flaws, and more interested in your purpose than your budget. Straightness is the product. The stones are just how it gets delivered. And if a shop fails the interview, the free Fake-Spotting Guide will help you protect yourself in the shops you cannot choose.

The traditions described here are part of cultural and spiritual history. Crystals are not a treatment for any medical or psychological condition. Please read our full disclaimer.

Sources & Further Reading

Standard gemological trade practice on treatment disclosure (heating, dyeing, stabilization, coating); commercial naming conventions (larimar as blue pectolite); stone care vulnerabilities documented in our pairings and care article; treatment-detection checks detailed in the fake-spotting guide.