Emeralds from Colombia
One-of-a-kind pieces purchased directly from the source in Colombia, certified by an independent laboratory, and fully documented from the mine to the invoice.
From the mine to your jewelry box
Direct sourcing and rigorous verification at every stage.
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Selection at the Source
Stones hand-selected one by one from the mines of Boyacá, Colombia.
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Gemmological Testing
Each emerald is inspected and described in detail (origin, treatment, weight).
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Independent Certificate
Authenticity certified by an independent laboratory.
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Insured and Trackable Shipping
Secure, insured, and trackable shipping worldwide.
The Essentials
Colombian emeralds are considered the global benchmark for this gemstone: the deposits in Boyacá and Cundinamarca produce stones with the most saturated green color, resulting from a geological formation found nowhere else in the world within sedimentary rocks. Johya purchases its emeralds directly in Colombia, without intermediaries, and sells each stone with a certificate from an independent laboratory, specifying its exact oil treatment level and documented history. The prices on this page reflect direct sourcing: you pay for the stone, not the chain of intermediaries.
My name is Vincent Renault, and I’m a certified gemologist. Together with my business partner Dimitri Velasco, we founded Johya based on a simple idea: to purchase every emerald ourselves, in person, through direct contact in the Boyacá region, and then have it certified by an independent laboratory before offering it here. This page showcases the stones currently available. The text below explains what makes Colombian emeralds unique, what the terms on our product pages mean, and how to understand our pricing.
Vincent Renault, certified gemologist and co-founder of Johya
Why Colombian Emeralds Set the Global Standard
The emerald is a geological anomaly: its formation requires the combination of beryllium, found in granitic rocks, and chromium or vanadium, found in rocks of deep origin. These two worlds almost never meet. Everywhere else—in Zambia, Brazil, or Russia—this combination occurs at the contact zone of a magmatic intrusion. Colombia is the only major deposit in the world where emeralds form without any magmatic activity: hot brines circulate through black Cretaceous sedimentary shales, dissolving the necessary elements and causing the crystals to grow in veins of white calcite.
This unique formation process accounts for the Colombian green, often described as velvety: a pure, saturated green that is less influenced by iron than that of African emeralds. It is because of this distinctive characteristic that the international jewelry industry pays a premium for Colombian origin when it is certified.
Muzo, Coscuez, Chivor: What Changes Depending on the Mine
Colombia's deposits stretch across two belts on either side of the Cordillera Oriental, in the departments of Boyacá and Cundinamarca. Three companies dominate the market.
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Muzo
The classic choice. The warm, rich greens that have made the country famous. This is where we shop most often, and these trips are documented in our travel journal.
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Coscuez
A few kilometers from Muzo, stones with a similar appearance—a warm, saturated green—and their own distinctive pattern of inclusions.
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Chivor
On the eastern belt, bluish-green hues and beautiful clarity—qualities highly sought after by jewelers.
The name of a mine is more of a marketing tool than a verifiable fact: a stone purchased at the Muzo market did not necessarily come from the Muzo mines. We only claim a specific mine of origin when a laboratory can verify it; otherwise, our product descriptions list the origin as Colombia, which is the only verifiable information.
Read: Muzo, the Emerald Capital of the World
What We Check Before Buying a Stone
An emerald can be appraised in a few minutes but takes several days to verify. Here’s what we check on-site before any purchase.
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10x Magnifying Glass
Examining inclusions and checking for the "flash" effect, the first indication of a resin fill.
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365 nm UV Lamp
A wavelength that is more effective than standard lamps at detecting treatment residues.
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Routine Weighing
Weight is recorded at every stage between purchase and cutting: this is the cornerstone of our traceability system.
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Controlled Light
The high-altitude sun makes the colors appear more vivid: a stone’s true quality is also revealed in the shade.
The final inspection is always conducted by an independent laboratory—either in Bogotá or in Europe—which confirms the stone’s natural origin, its Colombian origin, and the level of treatment indicated on the certificate provided with the stone. Our comprehensive method is detailed on the dedicated page.
Minor oiling, no oil: Read our product sheets
Virtually all emeralds on the global market are treated with a colorless oil—traditionally cedar oil—which fills fine cracks and improves transparency. This time-honored treatment is accepted by all laboratories because it is reversible. Certificates classify it as: none, insignificant, minor, or moderate. On our product sheets, the notation “minor oil treatment” corresponds to these low grades; the rare stones with no oil at all are marked “no oil” and command a premium.
What we refuse to use is epoxy-type synthetic resin: an irreversible filler that yellows over time and masks the stone’s true condition. No emerald sold by Johya is resin-treated, and the exact degree of oiling is indicated on each stone’s certificate, even when French regulations do not require it to be mentioned.
Price of a Colombian Emerald: 2026 Benchmarks
The price per carat of a Colombian emerald depends first on its color, then on its clarity, the degree of oil treatment, and its weight. Here are the market benchmarks for 2026.
| Quality Level | Price per carat reference |
|---|---|
| Commercial Grade (pale green, heavily oiled) | A few dozen to a few hundred euros |
| Certified to be in excellent condition (vibrant green, minor oiling) | 800 to 2,500 euros |
| Exceptional stone (intense to vivid green, none or insignificant) | 3,000 euros and well beyond |
Weight has a nonlinear effect: for stones of equal quality, a 2-carat stone is worth significantly more than two 1-carat stones. Our guides explain these mechanisms in detail: the price of a 1-carat emerald and the 7 criteria that determine a stone’s grade.
Frequently Asked Questions About Colombian Emeralds
How can you tell if an emerald is from Colombia?
It’s impossible to tell by eye. The classic indicators—a slightly bluish-green color and three-phase inclusions—are sometimes found in emeralds from other sources. Only laboratory analysis, which combines the examination of inclusions, spectrometry, and trace element chemistry, can confirm a Colombian origin. That’s why every Johya emerald is sold with a certificate from an independent laboratory stating its origin.
Why are Colombian emeralds more expensive?
Because global demand is focused on them. Their rich green color, resulting from a unique sedimentary geology, serves as the color standard for the entire industry. For comparable quality, certified Colombian diamonds command a higher price than those from Zambia or Brazil, and declining production at historic mines is exacerbating this tension.
What is a trapiche emerald?
A rare formation found only in Colombia: six dark rays radiate from the center of the crystal, forming a wheel. This natural pattern, caused by carbon inclusions trapped during the crystal’s growth, cannot be replicated. Trapiches are cut into cabochons and are sought after by collectors. Several stones on this page feature this pattern.
Does an oiled emerald lose its value?
No, as long as the oil treatment is light. A minor or insignificant grade is the market standard and does not diminish the value of a beautiful stone. What does reduce its value is a heavy oil treatment that masks numerous cracks, or an irreversible resin filling. The exact grade is listed on the certificate.
Muzo, Chivor, or Coscuez: Which mine should you choose?
None is objectively better than the others. Muzo is renowned for its warm, saturated greens; Chivor for its very clear bluish greens; and Coscuez for a profile similar to Muzo’s. The individual quality of a stone matters more than the name of its mine, and a mine’s origin is only valid if a laboratory confirms it.
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Certified Stones
100% authentic, gemological certificate provided
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Guaranteed direct sourcing
Zero intermediaries, direct purchase at the source in Colombia
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Secure Delivery
Insured and tracked shipping worldwide
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7/7 Customer Service
Our team is available daily to assist you
Learn More
Understand, compare, and choose your gemstone with confidence.