Description

Almandine (Al2Fe3(SiO4)3) is a member of the garnet group of silicate minerals, prized for its distinctive physical and chemical properties. Its primary commercial value lies in its use as a high-density, chemically inert abrasive and filtration medium. This product is essential for industries requiring durable, non-reactive granular materials for precision surface finishing and water jet cutting applications. We supply high-purity almandine garnet to meet the stringent demands of global industrial markets.

Application

• Abrasive Blasting & Waterjet Cutting: A key component in high-performance abrasives for surface preparation and precision cutting of metals, stone, and composites due to its hardness, angular fracture, and low dust generation.
• Water Filtration Media: Used as a high-specific-gravity bed material in multi-media filters for potable water and wastewater treatment, offering excellent hydraulic characteristics and chemical stability.
• Abrasive Powders & Compounds: Processed into fine powders for use in lapping, polishing, and non-slip surface coatings.
• Foundry & Metalcasting: Employed as a specialty molding sand for certain ferrous castings, where its thermal properties are beneficial.
• Geological & Industrial Research: Serves as a standard mineral sample and a source of iron and aluminum in experimental studies.
• Decorative & Industrial Coatings: Incorporated into epoxy and polymer systems to create durable, textured, and wear-resistant finishes.

Basic Information

Product Name	Almandine
CAS No.	1302-62-1
Molecular Formula	Al2Fe3(SiO4)3
Molecular Weight	497.75 g/mol
Synonyms	Almandine Garnet; Iron Aluminum Silicate; Almandite; Precious Garnet; Almandine Stone; Almandine (Mineral); Ferrous Aluminum Silicate; Garnet Sand
EINECS	215-100-0

Quality Control

Our almandine garnet is processed and graded to meet precise industrial specifications for particle size distribution, hardness, and chemical composition. Quality is assured through a battery of tests including sieve analysis, specific gravity measurement, and chemical assay. A Certificate of Analysis (COA) detailing lot-specific parameters is provided with every shipment to ensure traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at ambient temperature (15-25°C). Keep containers sealed when not in use to prevent moisture absorption and contamination from other particulates. Isolate from strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	Granular, dark red to brownish-red particles
Chemical Composition (Typical)	Almandine Garnet (Al2Fe3(SiO4)3) ≥ 95%
Specific Gravity	3.9 - 4.1 g/cm³
Mohs Hardness	7.5 - 8.0
Melting Point	> 1200 °C
Particle Size (Mesh)	Custom grades available (e.g., 16/20, 20/40, 30/60, 80, 120)
Moisture Content	< 0.5%
Acid Solubility	< 3%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.