Episode 4. Extraordinary emeralds, and the one that went missing

An emerald that disappeared

Oral tradition: told locally, not confirmed by documents

An emerald almost half a meter long disappeared. First it left a Colombian mine hidden under a ruana. It was sold, it reached the United States, and then its trail was lost. This happened in Gachalá.

That is how the story is told in the region. The documents tell a slightly different one, further down this page.

Before the shine

We learn to look at emeralds once they leave the mountain, polished and priced. In Colombia they come from two belts: Chivor and Gachalá in the east, Muzo and Coscuez in the west, mineralized about 65 and between 38 and 32 million years ago.^[1]

And no, the age gap does not mean thirty million extra years to fatten the eastern stones. They are separate geological episodes, each of which left traces inside the crystals.^[1]

Salt water, gas and a tiny cube of salt

The most identifiable feature of Colombian emeralds is the jagged three-phase inclusion: a pocket of brine holding a gas bubble and a cubic crystal, typically halite or sylvite, usually between 100 micrometers and 1 millimeter.^[2]

For years, seeing those three phases meant one thing: Colombia. Today similar inclusions are known in emeralds from Afghanistan and China, and from a minor deposit at Musakashi, in Zambia.^[2]

Size settles it. Jagged fluid inclusions larger than about 500 micrometers, half a millimeter, are unique to Colombia and count as diagnostic evidence of origin.^[2] Even the bubbles need an ID card.

Bigger is not better

In 1999 Muzo produced Fura, an uncut crystal of about 11,000 carats, 2.2 kilograms.^[7] The same year it produced Tena, around 2,000 carats, far smaller and celebrated as the more valuable of the two for its dark, even green.^[8]

In Gachalá, Emilia weighed 7,025 carats according to the 1996 El Tiempo account.^[5] Being the biggest does not guarantee winning.

Patricia and the ten dollars

Patricia is a 632-carat crystal from Chivor, now at the American Museum of Natural History in New York.^[3]

The pocket was opened in January 1921 by a mine worker named Justo Daza; the manager reached into the vein up to his elbow and pulled the crystal out.^[3] Spanish-language sources date the find to 1920.^[9]

Daza is said to have received about ten dollars.^[3] The stone went to New York. Justo, with ten dollars.

Gachalá, again

The Gachalá emerald is an 858-carat crystal found in 1967 and kept in the Smithsonian’s National Museum of Natural History since 1969.^[4]

Just when you think Gachalá has shown enough, there is another one. It was found at the Vega de San Juan mine.^[4]

La Indiecita, the one that is missing

Oral tradition: told locally, not confirmed by documents

In Gachalá’s mining memory, Emilia had a sister: purer, almost half a meter long, carried out of the mine under a ruana, sold, taken to the United States and lost. People call it La Indiecita.

The record is close but not identical. In 1996 El Tiempo heard the mine owner’s version: on the day Emilia appeared, a worker named Tito Daza found a second stone, wrapped it in a cape, and sold it months later; it was said to have been resold in the United States.^[5] Spanish Wikipedia instead describes an 8,000-carat stone found by Tito Daza three years later and known as “La Tito”.^[6] No document we found calls it La Indiecita.

The series also mentions two stories we could not document: El Monstro, a Gachalá crystal said to weigh 16,020 carats, and an explosion at Chivor that destroyed a crystal possibly larger than Patricia. Justo Daza, who found Patricia in Chivor, and Tito Daza, of the Gachalá story, are different people.

What the label cannot say

Field notes: what we saw in the region

A laboratory can tell you what an emerald holds inside. A museum can tell you what it weighs. No label can tell you everything that happened before. Before New York, Washington, a vault or a display case, there was a mountain, a mine, and someone who had to bring the stone out.