Lab-grown, heated, dyed, and natural are different goods. A purple point is not a species. Smithsonian and GIA language treats treatment as disclosure, not a secret. If the stall card skips the treatment, ask. Metaphysical claims on that same card are culture. Attribute them. Do not state them as fact.
Four labels
| Word | What it usually means |
|---|---|
| Natural | Mined and cut. It may still be oiled or waxed. Read the seller card. |
| Heated | Color changed with heat; common in some quartz and corundum. |
| Dyed | Color added; often obvious on fracture. |
| Lab-grown | Grown in a lab; same chemistry, different origin story. |
Smithsonian mineral sciences is the museum cite. Florida cave geology stays on Caverns from state-park material only. Do not map collecting sites.