Frontier Sandstone
A current producer website has not been confirmed. This producer remains listed from the documented material catalogue or quarry register.
Sandstone · Montana
Cladding & exterior walls · Flooring · Landscape & site stone
Strong domestic material and named-source evidence; legal extraction operator, exact coordinates and photo reuse remain unconfirmed. Do not duplicate each cut or finish as a new material.
View material sourceColours and uses reflect the linked source descriptions. Confirm origin, samples and suitability for the proposed application with the producer.
These are the records linked by the curated register, which may cover only part of the producer’s operations. Portable records and facilities are identified separately.
MSHA’s NO_EMPLOYEES field comes from the Mine Information Form. The snapshot is dated 18 Sept 2026; it does not give this field a reporting-period date. These are mine-record figures, not current company headcounts or proof of production. MSHA field definitions.
Documented materials or architectural quarry records support this listing. An exact permit is not inferred where no supported association exists. NSI membership, photographs and employee count are not eligibility requirements.