Typically, sand is clean, immature sand, dominated by fresh transparent to translucent very light feldspar, but also containing dark pyroxene and other components.
Microscopic examination reveals subhedral and angular broken crystals of fresh plagioclase, fresh to slightly iron-stained pyroxene, fresh opaque oxides, unstrained quartz, fresh green hornblende and fresh to lightly iron-stained brown biotite. There are also cuspate shards of colourless isotropic fresh glass. Less commonly the same type of glass occurs as equant massive fragments or as porous pumiceous fragments. Minor other components comprise small lithic clasts of fresh to lightly weathered finely crystalline intermediate and acid volcanic rock.
A typical count of 100 points falling within sand clasts indicate the following composition (volume %)
16% Colourless glass
5% Intermediate volcanic lithic clasts
4% Acid volcanic lithic clasts
4% Opaque oxides
The sand is typically regarded as clean, texturally and mineralogically immature sand, dominated by Piagioclase feldspar but also carrying other crystals, volcanic rock fragments and siliceous glass shards.
Filter sand has also been used as an abrasive media.
Two sizes of sand filter media are available:
Fine .3mm -2.36mm
Coarse 0.15 – 2.36mm Approximately 3.79% retained at 2.36mm sieve
Product is available in 20kg or metric tonne (1,000kg) bulk bags.