What's That Rock?

Emerald

Gemstone 🎂 May birthstone

The green variety of beryl, colored by chromium and sometimes vanadium. It nearly always has small internal flaws.

How to identify Emerald

  1. Green color with six-sided crystal shape
  2. Hard: scratches glass and quartz lightly
  3. Usually shows tiny internal cracks and inclusions

Often confused with

Real or fake?

  • Emeralds are almost always treated with oil or resin; this is normal but should be disclosed
  • A flawless, large green stone at a low price is a warning sign: it may be lab-made or glass

Is Emerald valuable?

Value depends on color and clarity; expert appraisal is needed.

Typical retail prices

Cut gemstone$100–3,000per carat
Collector specimen$15–200each

Fine, clean, untreated emeralds cost far more than this range.

Typical retail ranges in US dollars, compiled from public dealer and marketplace listings in October 2026. Real prices vary widely with quality, size and origin. This is general information, not an appraisal.

What changes the price

  • Color: vivid, slightly bluish green with strong saturation is the top grade
  • Clarity: nearly all emeralds have inclusions ('jardin'); an eye-clean stone is very rare and costly
  • Treatment: oiling or resin filling is routine; heavy filling lowers value, always ask for disclosure
  • Origin: Colombian, Zambian and Panjshir stones command premiums; a lab report names origin and treatment
  • Lab-grown and glass look-alikes exist, and a large flawless stone at a low price is a warning sign

Uses

  • Jewelry

Care

Often oil-treated and fragile. Avoid ultrasonic cleaners and hot soapy water; wipe with a damp cloth.

Identifying a stone from a description or a photo is an estimate. Many stones look alike. Ask an expert or a gem lab before you buy, sell or rely on an identification.

Updated October 2026