Erbium oxide
Er₂O₃The primary traded form, notable for its pink color, and a feedstock for fiber and laser applications.
Er68
Erbium
The element quietly carrying most of the world’s internet traffic.
Erbium’s defining application is one most people have never heard of but rely on daily: erbium-doped fiber amplifiers boost light signals directly, without first converting them to electricity, making them a core technology behind long-distance fiber-optic internet backbones. Erbium also gives Er:YAG lasers their water-absorbing wavelength, used in dermatology and dentistry for precise tissue removal with limited thermal damage.
Key Applications
- Erbium-doped fiber amplifiers for long-distance telecommunications
- Er:YAG lasers for dermatological and dental procedures
- Pink glass and ceramic coloring
- Minor use in specialty alloys
Key Facts
- Atomic number
- 68
- Primary supply
- Byproduct of heavy-rare-earth separation
- Key constraint
- Small volumes tied to overall HREE processing
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Pricing & Market Trends
Market Context
$46/kgup trend
Erbium oxide, 99.5% minimum, free on board • As of 2025 average
The USGS-reported average rose from $36/kg in 2021 to $53/kg in 2022, eased to $41/kg in 2023, then climbed to $43/kg in 2024 and $46/kg in 2025.
Source: USGS Mineral Commodity Summaries 2026, Rare Earths (Heavy) (February 2026)
Key Drivers
- Fiber-optic network and amplifier demand
- Er:YAG medical and dental laser demand
- Byproduct supply tied to HREE processing
Common Erbium Compounds
Erbium-doped fiber
Er-doped fiberThe core gain medium in amplifiers used to boost signals in fiber-optic networks.
Erbium chloride
ErCl₃A soluble precursor used in materials synthesis.
Direct Answers
Erbium questions, answered
What is erbium used for?
Erbium’s main use is in erbium-doped fiber amplifiers, which boost light signals in long-distance fiber-optic networks. It is also used in Er:YAG lasers for dermatology and dentistry.
What is erbium-doped fiber?
It is optical fiber containing erbium ions that directly amplify light at telecom wavelengths without converting the signal to electricity, enabling long-distance fiber-optic links.
How much does erbium cost?
The USGS reported a 2025 average of $46/kg for erbium oxide at 99.5% minimum purity, free on board, up gradually since 2023. This is historical context rather than a live quote.