Tools

Price Gauge

Enter an element, form, purity, and quantity. The gauge returns a low/mid/high USD per kg range, a confidence grade, and the sourced records behind it.

How prices are set →View as JSON →

Inputs

Gauge a price

Element *

6 retail · 0 bulk records on file for Erbium.

Form

Quoted in: Metal, Oxide.

Purity

Optional. Weights the estimate toward like-purity records.

Quantity

Under 25 kg is retail, 25 kg and up is bulk. Blank defaults to retail.

Tier override

Force a tier regardless of quantity. Retail and bulk are never mixed.

Reset

Erbium (Er) · Retail tier

Estimated fair price

Low · P25

$32.09

Mid · P50

$2,008.05

High · P75

$11,190.95

USD per kg

Low confidence

6 records · 6 sellers · Mar 15, 2026 to Apr 4, 2026

Caveats

Indicative only: 6 records from 6 sellers.

How this was calculated

Basis & provenance

Records matched: 6
Distinct sellers: 6
Quote date range: Mar 15, 2026 to Apr 4, 2026
Tier band: Retail
Forms in sample: Oxide, Metal
Avg record confidence: 0.58
Observed price range: $28 to $27,530
Match mode: all forms

Method

retail tier (default, no quantity given) · all forms (oxide, metal) · 6 record(s) from 6 seller(s) · weighted P25/P50/P75 by confidence×recency(½-life 180d) · wide dispersion (IQR 556% of median) → confidence capped

Source records (6)

R-0042
R-0043
R-0044
R-0215
R-0216
R-0217

Each record is listed in full on the Erbium provenance table (6 records total). To add a sourced quote, contribute the record.