212319 - Other Crushed and Broken Stone Mining and Quarrying

Introduction

If you're involved in the mining or construction industries, understanding NAICS Code 212319 is crucial. This specialized classification focuses on establishments engaged in mining and quarrying a variety of crushed and broken stone types—excluding limestone, granite, and sandstone. These materials are essential components in construction projects, infrastructure development, and many other applications. Whether you're a business owner, government contractor, or industry analyst, knowing the ins and outs of NAICS 212319 can unlock opportunities and ensure compliance with federal standards.

What is NAICS Code 212319?

NAICS Code 212319 stands for Other Crushed and Broken Stone Mining and Quarrying. This industry classification covers establishments primarily engaged in:

• Mining and quarrying crushed and broken stone types except limestone, granite, and sandstone.
• Producing various crushed stone materials for construction aggregates, riprap, and other industrial uses.

Unlike other NAICS codes that focus on more common stone types, 212319 captures a diverse range of specialty stones used in different geological and industrial contexts.

Sector Overview

This NAICS code falls under the broader Mining, Quarrying, and Oil and Gas Extraction sector (NAICS Sector 21). This sector encompasses the exploration, extraction, and processing of natural resources critical to the economy, including minerals, metals, and energy resources.

Typical Business Activities Under NAICS 212319

Businesses categorized in NAICS 212319 generally engage in:

• Mining of non-traditional crushed stone materials.
• Quarrying miscellaneous crushed stone types beyond the common varieties.
• Production of construction aggregates derived from various specialty stones not otherwise specified.
• Beneficiating (processing) operations that improve raw stone quality (e.g., grinding and sizing).

These activities support construction companies, road builders, landscapers, and manufacturers who rely on a wide array of stone materials.

Size Standards and Eligibility

According to the U.S. Small Business Administration (SBA), the size standard for NAICS Code 212319 is based on the number of employees:

• Maximum of 550 employees to qualify as a small business under this classification.

This threshold guides businesses in federal contracting eligibility and assists agencies in defining small business participation goals.

Examples of Businesses Under NAICS 212319

• Mining companies extracting basalt, diabase, and volcanic rock stones.
• Quarry operators specializing in trap rock or serpentine crushed stone.
• Firms producing bituminous limestone or bituminous sandstone aggregates.
• Specialty stone beneficiation plants, such as those processing mica schist, onyx marble, or granules of slate.
• Companies preparing riprap for erosion control using stones other than granite and limestone.

These businesses provide essential raw materials for various construction and environmental projects.

Detailed Code Description Table

Stone Type / Activity	Description
Basalt crushed and broken stone	Mining and beneficiating basalt stone
Bituminous limestone	Mining and beneficiating bituminous limestone
Bituminous sandstone	Mining and beneficiation of bituminous sandstone
Boulder crushed and broken mining	Extraction and processing of boulder stone
Diabase crushed and broken stone	Mining and beneficiation of diabase stone
Dolomitic marble crushed and broken stone	Mining crushed dolomitic marble stones
Gabbro crushed and broken stone	Gabbro stone mining and beneficiation
Ganister crushed and broken stone	Mining and processing ganister stone
Granules, slate mining/beneficiating	Mining slate granules and beneficiation operations
Grits crushed and broken stone	Extraction and processing of grit stone
Limestone, bituminous mining/beneficiating	Bituminous limestone mining, excluding common limestone types
Marble crushed and broken stone	Mining crushed marble stones
Mica schist crushed and broken stone	Mining and beneficiation of mica schist
Onyx marble crushed and broken stone	Mining onyx marble stones
Quartzite crushed and broken stone	Mining and beneficiating quartzite stones
Riprap (except granite, limestone) preparation plants	Preparation plants processing riprap stones excluding granite and limestone
Riprap (except limestone and granite) mining or quarrying	Extraction of riprap stones excluding limestone and granite
Sandstone crushed and broken stone	Sandstone mining and beneficiation
Schist, mica, crushed and broken stone mining/beneficiating	Mining and processing mica schist
Serpentine crushed and broken stone	Extraction and beneficiation of serpentine
Slate crushed and broken stone	Mining crushed slate stones
Stone (except limestone and granite) beneficiation plants	Grinding and beneficiating stones other than granite and limestone
Stone, crushed and broken (except granite or limestone) mining/beneficiating	Mining and processing miscellaneous crushed stones
Trap rock crushed and broken stone	Mining trap rock stone
Verde' antique crushed and broken stone	Mining and beneficiation of Verde' antique stone
Volcanic rock crushed and broken stone	Mining volcanic rock stone

Frequently Asked Questions (FAQs)

1. What distinguishes NAICS code 212319 from other stone mining codes?

NAICS 212319 excludes limestone, granite, and sandstone, which are covered under separate codes. This classification targets specialty and less common crushed stone types used for unique construction and industrial applications.

2. How large can a business be to qualify as small under NAICS 212319?

Businesses with 550 or fewer employees qualify as small businesses for this category according to SBA standards.

3. What industries utilize materials produced by NAICS 212319 companies?

Construction, road building, landscaping, erosion control, and specialty manufacturing industries rely on these crushed stones for aggregates and other uses.

4. Are beneficiation activities included under this NAICS code?

Yes. Beneficiation such as grinding, sizing, and processing of these stone types is considered part of the industry under 212319.

5. Can companies mining limestone or granite fall under NAICS 212319?

No. Limestone and granite are classified separately under NAICS 212312 (Crushed and Broken Limestone Mining and Quarrying) and 212313 (Crushed and Broken Granite Mining and Quarrying).

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Harness the potential of NAICS Code 212319 by understanding its scope and significance. Whether you’re entering the mining sector, expanding operations, or targeting federal contracts, leveraging this knowledge can elevate your business strategy and compliance efforts.