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 *

3 retail · 0 bulk records on file for Selenium.

Form

Quoted in: Powder.

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

Selenium (Se) · Retail tier

Estimated fair price

Low · P25

$20.5

Mid · P50

$22

High · P75

$26.5

USD per kg

Medium confidence

3 records · 3 sellers · Mar 15, 2026

How this was calculated

Basis & provenance

Records matched: 3
Distinct sellers: 3
Quote date range: Mar 15, 2026
Tier band: Retail
Forms in sample: Powder
Avg record confidence: 0.60
Observed price range: $20 to $28
Match mode: all forms

Method

retail tier (default, no quantity given) · all forms (powder) · 3 record(s) from 3 seller(s) · weighted P25/P50/P75 by confidence×recency(½-life 180d)

Source records (3)

R-0087
R-0088
R-0089

Each record is listed in full on the Selenium provenance table (3 records total). To add a sourced quote, contribute the record.