Stillwellite

A variety of Minerals

What is Stillwellite?

Stillwellite-(Ce) is a rare-earth boro-silicate mineral with formula: (Ce,La,Ca)BSiO5.

Pricing varies for every rock and mineral, so use these universal factors to gauge Stillwellite before comparing listings or appraisals.

Size & Weight

Larger, intact specimens usually command higher prices.

Rarity & Demand

Scarce material or popular varieties sell at a premium.

Condition & Finish

Chips, repairs, and heavy wear lower value; clean prep helps.

Treatment & Provenance

Untreated specimens with documented locality are prized.

Applies to all rocks & minerals.

See where Stillwellite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview

North ZoneCentral RidgeSouth Basin

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