American stone for architects and designers.

Producer source record

Greenstone Slate / Briar Hill Quarry

Back to the producer

Vermont roofing slate producer. Only the documented domestic slate range is represented here; imported lines are excluded.

Contact & product sources

Vermont slate coloursSource checked 2026-09-23Vermont product brochureSource checked 2026-09-23

Materials & uses

Vermont gray, gray-black and gray-green roofing slate

Slate · Vermont

Colour families: Gray, Black, Green, Cream / buff

Roofing

Some semi-weathering selections develop buff tones. Confirm the weathered range with the producer.

View material source

Vermont Gray Black (Briar Hill)

Slate · Vermont

Colour families: Gray, Black

Roofing

View material source

Non-weathering Mottled Green / Purple

Slate · Vermont

Colour families: Green, Purple / lilac

Roofing

View material source

Colours and uses reflect the linked source descriptions. Confirm origin, samples and suitability for the proposed application with the producer.

Vermont Gray Black (Briar Hill)Vermont Unfading GrayNon-weathering Mottled Green / Purple

4 linked MSHA operations

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.

Calder

GREENSTONE SLATE COMPANY

Poultney, Vermont · MSHA 4300801

1reported workersIntermittentStatus since 11/18/2019

Jkl Quarry

GREENSTONE SLATE CO.

Wells, Vermont · MSHA 4300681

1reported workersIntermittentStatus since 08/09/2024

Quarry Slate Ind.

GREENSTONE SLATE COMPANY

Poultney, Vermont · MSHA 4300012

42reported workersActiveStatus since 03/23/1983

Big Boston Quarry

BRIAR HILL QUARRY, LLC

West Pawlet, Vermont · MSHA 4300554

6reported workersActiveStatus since 12/12/2000

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.

Why this producer is here

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.

Register grouping
Greenstone Slate / Briar Hill Quarry (Vladyka & Hill)Curated relationship; not an independent ownership audit.
Register source
US_Dimension_Stone_Quarry_Register_v0.7.xlsx · Live dimension quarries / Producers (curated)Register reviewed 2026-09-23; MSHA snapshot 18 Sept 2026.
NSI catalogue coverage
No NSI catalogue match in this register.Catalogue coverage does not establish current membership.