Andes-Provenance Claim Scrutinized as Local Gem Show Vendor Sells Mass-Produced Agate

The bag was already in Nadia Perrin's tote when Otis Vale asked, in his pleasantest voice, which part of the Andes.

"All of it," said the vendor, and gestured at the range the way you gesture at a buffet.

Nadia had bought six slices of crazily patterned agate for twenty-eight dollars from a booth that used the word "provenance" six times in four minutes, which I counted from the next table over. Provenance is the first term a newcomer learns to say fluently and the first one they learn to check afterward.

The claim was geologically tidy, which is what made it work. Agate fills gas cavities in volcanic rock; andesite is volcanic rock; the Andes are made of it. The reasoning was simply not evidence.

The evidence was arithmetic. Half under the vendor's table sat an open carton holding the same six slices in stacks of forty, all cut to the same thickness, all showing the same banding sequence in the same order. Field agates vary, because gas cavities vary. These varied the way a photocopier varies.

I borrowed a lens. The color was even through the stone rather than concentrated along fractures, which is the difference between a stone that grew that way and a stone that was helped. Nadia looked at the lens, then at the slices, then at the card, which read like a small poem about a mountain range and did not read like a lot number.

"They're still agate," she said.

She is right. Nothing fake was sold. What was sold was a story attached at a markup of roughly the price of the stone itself, and the story was the only part of the transaction with no weight, no streak, and no specific gravity.

Otis Vale, who sits on the standards board and has never once been uncertain out loud, ruled at the next break that a written origin line on a display card constitutes a claim of record and is binding on the seller until contested in writing. Nobody asked what happens when the carton underneath contradicts the card.

Inez Fenn's monthly update recorded the episode in two lines. The record says Nadia Perrin purchased six slices at the spring show. It does not say they were found, and it does not say they weren't.

The vendor is not a villain. He bought a wholesale lot like everyone else in that row and wrote the Andes on the card because the Andes sell and a warehouse does not. One sentence describes a mountain, and one sentence describes a purchase, and buyers are reading them as the same sentence.

I retired the claim on the record: purchased, not found. Nadia kept one slice anyway, because the banding turned nicely and it sat well in the hand. She has since learned to ask for the lot number before the poetry. That's the whole lesson, and it took one afternoon and six slices.