Every piece of Colombian emerald jewelry starts as a rough green crystal deep in the mountains of Colombia and ends, weeks later, in a jeweler's hands as a stone is set into gold or silver one prong at a time. If you've ever wondered why emeralds look "cloudy" inside, whether yours is real, or why small emeralds rarely come with a lab report, this guide answers it in plain language, with pictures.
- Colombian emerald jewelry is made in 6 steps: mine → sort → cut & polish → design → cast the metal → hand-set the stone.
- Small inclusions inside an emerald (called jardín, "garden") are normal and are a sign of a natural stone.
- Most emeralds sold worldwide are treated with oil to improve clarity. Ask your jeweler, and avoid ultrasonic cleaners.
- For small stones (3 mm and under), a lab report often costs more than the stone itself, so a supplier's certificate of origin is the common proof.
Why Colombian emeralds are so famous
Emeralds are found in several countries, but Colombia is the name most jewelers associate with the finest green. The best-known mining areas, Muzo, Chivor and Coscuez in the department of Boyacá, have produced emeralds for centuries. Colombian stones are prized for a pure, saturated green, often with a slightly bluish glow, that many people simply call "Colombian green."
And green is having a moment: the American Gem Society named blues and greens, including emerald's "deep, saturated green," among its key jewelry trends for 2026.
How emerald jewelry is made, step by step
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Mining in Colombia
Emeralds grow inside veins of rock in Colombia's eastern Andes. Miners extract the rough crystals by hand and with tunnels, and much of the green rock that comes out holds no gem-quality stone at all. That scarcity is part of what makes emeralds valuable. -
Sorting the rough
Rough emeralds are washed and sorted by color, clarity and size. Experienced sorters decide which crystals become large center stones and which become the small, bright accent stones used in everyday fine jewelry. -
Cutting and polishing
A lapidary (gem cutter) grinds facets onto the stone to bring out its color while keeping as much weight as possible. The classic rectangular "emerald cut" was designed for this stone because it protects the corners and shows off the green. Small stones are often cut round, oval or square. -
Designing the piece
The jeweler sketches the design or builds it as a 3D model, planning exactly where each stone will sit and how much metal will hold it. -
Casting the metal
Most fine jewelry is made with the lost-wax method: a wax copy of the design is covered in plaster, the wax is melted out, and molten metal is poured into the empty space. At LUCIGO we cast in 18K gold (75% pure gold) and sterling silver 925 (92.5% pure silver), and we recycle gold and silver whenever we can. -
Hand-setting the emerald
This is the delicate part. Emeralds are hard (7.5–8 on the Mohs scale) but can chip if struck at the wrong angle, so the setter works under magnification, bending each tiny prong or bezel over the stone by hand. A final polish, and the piece is finished.
Why does my emerald look "cloudy" inside?
Those wispy lines and tiny specks are called jardín, Spanish for "garden." They formed while the crystal grew millions of years ago. Gemologists treat them as part of an emerald's fingerprint, and nearly every natural emerald has some. A completely clean, cheap green stone is more likely to be glass or lab-grown.
How to tell if an emerald is real
| Natural emerald | Lab-grown emerald | Glass or simulant | |
|---|---|---|---|
| What it is | Beryl mined from the earth | Same mineral, grown in a lab | Glass, green quartz or other material |
| Inside | Wispy, irregular inclusions | Often very clean, or with tell-tale growth patterns | Clean, or round bubbles |
| Price | Highest per carat | Lower | Very low |
| How to confirm | A gemologist or gem lab can tell them apart with magnification and lab tools. At home, you can only spot obvious red flags. | ||
Simple rule: ask the seller directly whether the stone is natural, where it was mined, and whether it has been treated. A trustworthy jeweler answers all three in writing.
Are emeralds treated with oil?
Usually, yes. Filling tiny surface-reaching fissures with a colorless oil (traditionally cedarwood oil) is a long-standing, widely accepted practice that improves an emerald's clarity. The International Gem Society advises buyers to "always assume emeralds are treated until proven otherwise." Some stones are instead filled with resin, which should always be disclosed.
Our honest answer: LUCIGO emeralds are 100% natural and mined in Colombia, never lab-created. Because our stones are small, we don't lab-test each one for oil, so please assume your emerald may have been traditionally oiled, as most emeralds are.
Why are emeralds in everyday jewelry so small?
Large, clean emeralds are extremely rare, and their price climbs steeply with size. Small, bright stones let you wear real Colombian emerald every day at an accessible price. Most LUCIGO stones are 3 mm or smaller, chosen for strong color rather than size.
Why doesn't my emerald come with a GIA report?
A full lab report from a lab like GIA can cost more than a small emerald is worth, so it is mainly used for larger, high-value stones. For small stones, the usual proof is a certificate of origin from the supplier. LUCIGO buys emeralds in volume from Colombian suppliers and holds that certificate of origin for our stones.
How to care for emerald jewelry
- Clean gently: lukewarm water, mild soap and a soft brush. Pat dry.
- Skip ultrasonic and steam cleaners: vibration and heat can remove oil and stress the stone.
- Put it on last: after lotion, perfume and hairspray.
- Take it off for the gym, gardening and cleaning with chemicals.
- Store separately in a soft pouch so harder gems (like diamonds) don't scratch it.
Frequently asked questions
Are Colombian emeralds better than other emeralds?
Colombian emeralds are famous for their pure, saturated green, which many jewelers consider the benchmark. But every emerald is judged individually on color, clarity, cut and size, so a fine stone from elsewhere can beat a poor Colombian one.
Is an emerald with inclusions still valuable?
Yes. Inclusions are expected in emeralds and are a sign of natural origin. Color matters most for an emerald's value, followed by clarity and cut.
Can I wear an emerald ring every day?
Yes, with a little care. Emeralds rate 7.5–8 on the Mohs hardness scale, hard enough for daily wear, but they can chip from a sharp knock. Protective settings like bezels and small stones help.
How can I tell if an emerald is real at home?
You can spot red flags (a perfectly clean stone, round bubbles, a price that seems too low), but only a gemologist can confirm. Ask the seller in writing whether the stone is natural, where it was mined and whether it is treated.
Is 18K gold or silver 925 better for emeralds?
18K gold (75% gold) resists tarnish and gives warm contrast to green. Sterling silver 925 is more affordable and gives a cool, modern look, but it needs occasional polishing. Both hold emeralds securely.
Wear a piece of Colombia
Natural Colombian emeralds, cast in 18K gold and silver 925 and hand-set by our jewelers. Named for Lucila & Gonzalo, the grandparents who started it all.
Shop Colombian emerald jewelrySources: International Gem Society, Emerald Treatments and Alternatives; American Gem Society, Summer 2026 Jewelry Trends. US orders ship free from Texas in 2–5 business days, with 14-day returns.