Hard Rock Garnet’s unique characteristics improve production rates, reduce abrasive usage, and lower disposal and clean-up costs. The angular shape, hardness, and bulk density of Hard Rock Garnet provides fast cutting, ideal for removing thick coatings and producing deeper surface profiles. The extremely low chloride levels of Hard Rock Garnet reduces surface contamination versus Alluvial Beach Garnets. Typical applications include blast rooms, blast yards, bridges, offshore platforms, oil refineries, pipelines, railcar shops, shipyards, storage tanks, and water towers.


Hard Rock Garnet’s angular shape, hardness, and bulk density provides fast cutting ability, significantly increasing the amount of square feet per hour that can be blasted. This increase in production will lower your labor hours and expedite blasting.


Hard Rock Garnet is a mined mineral, mined from veins below the Earth’s surface. Due to the location where Hard Rock Garnet is mined the exposure to sources of chlorides is low. This extremely low level of chlorides, less than 0.5 ppm, reduces the risk of surface contamination.


The cutting ability of Hard Rock Garnet will increase production rates and reduce abrasive consumption, significantly reducing shipping costs, clean-up labor, and disposal costs.

Hard Rock Garnet


Shape: Angular
Hardness: 7.0–8.0 Mohs
Bulk Density: 130–150 lbs./cu. ft.
Specific Gravity: 4.0–4.1 g/cc
Free Silica: Less than 0.5%
Total Chlorides: Less Than 0.5 ppm
Mined Mineral Abrasive


Recommended nozzle pressure: 90–110 psi
Recommended working distance from surface: 18–36 inches


Bulk Bags: 3,000 lbs.
Bags: 50 lbs.


12X20 Typical Profile: 3.4–3.9 mils
​36 Typical Profile: 3.0–3.4 mils
30X60 Typical Profile: 2.5–3.0 mils
80 Typical Profile: 1.8–2.3 mils

Optional Accessories

Blast Hose

Blastmaster® Abrasive Blasting Hose

Blastmaster® Abrasive Blasting Hose is available in standard lengths of 50, 100 and 400 feet, and custom lengths up to 200 feet.

Blast Nozzles

Abrasive Blasting Nozzles

A wide variety of blast nozzles are available to meet even the most challenging work site requirements.

Blastmaster® Maxum III Abrasive Metering Valve

Blastmaster® Maxum III Abrasive Metering Valve

The Blastmaster® Maxum III Abrasive Metering Valve is an air-actuated, normally-closed metering valve for use with a pressure-hold remote control system.

Multiport Sleeve

Multiport Sleeve

Fixed, pre-metered sleeve with .178”, .218”, .278”, and .343” ports for use with fine abrasives.


Technical Information


Inhaling dusts from abrasive blasting may result in serious injury, disease, or death.
According to OSHA, only a Type CE NIOSH-certified blasting airline respirator with positive pressure blasting helmet should be used for abrasive blasting.

Product details are based on published information at the time of publication. Product details are subject to change without notice. Contact Marco for more information.