FELDSPAR

Feldspar is the name given to a group of minerals distinguished by the presence of alumina and silica (SiO2) in their chemistry. This group includes aluminum silicates of soda, potassium, or lime. It is the single most abundant mineral group on Earth.

Feldspar is a common raw material used in glassmaking, ceramics, and to some extent as a filler and extender in paint, plastics, and rubber. In glassmaking, alumina from feldspar improves product hardness, durability, and resistance to chemical corrosion.

We mine and process several grades of feldspar with a wide range of applications:

POTTASIUM FELDSPAR

BODY GRADE SECOND GRADE FIRST GRADE
ALKALI – 8 % ALKALI – 10 % ALKALI – 13 %
ALUMINA – 14 % ALUMINA – 16 % ALUMINA – 17 %
IRON – 0.3% IRON – 0.2% IRON – 0.1%
L VALUE L VALUE L VALUE
Detailed Specs Detailed Specs Detailed Specs

SODIUM FELDSPAR

SECOND GRADE FIRST GRADE
ALKALI – 6% ALKALI – 8%
ALUMINA – 15% ALUMINA – 17%
IRON – 0.15% IRON – 0.05 – 0.15%
Detailed Specs Detailed Specs