Quartz is the most abundant and most common mineral on the Earth. It is found in almost every geological environment and also it is at least a component of almost every rock type. It has a hexagonal crystal structure and is made of trigonal crystallized silica. It is most varied in terms of varieties, colors and forms.
The most important distinction between the types of quartz is that one is of macrocrystalline, which is individual crystal visible to the unaided eye, and the other is microcrystalline or cryptodrystalline varieties, aggregates of crystals visible only under high magnification. Chalcedony is the generic term for cryptocrystalline quartz. The transparent variety tends to be macrocrystalline and the cryptocrystalline varieties are either translucent or mostly opaque.
Salient Features
Clear (in pure form)
6-sided prism ending in 6-sided pyramid (typical)
It has a hardness of seven on the Mohs Scale which makes it very durable.
Sri Lanka is famous throughout the world for the exquisite mineral varieties of very high purity. Among them vein quartz too holds prime importance. The material, generally known as quartz is primarily made of silicon and oxygen (silica-SiO2) and is considered one of the most abundant minerals found in the Earth's crust.
Dear sir
We can supply you Magnese lumps from Brazil Grade MN 42 - 48 % qty 40000 Mts per month on CFR any port .
Pls send me your requirement .
Regs
Shajeev cp
A grade quartz: Quartz lumps with clean white / translucent sides and negligible physical impurities, with a silica percentage of around 98% or higher.
1. Oversize (% by weight) using NABL calibrated test sieves of Jayant Scientific = <10%
2. Undersize (% by weight) using NABL calibrated test sieves of Jayant Scientific = <10%
3. Contamination (number) which is visually counted in terms of black and red-yellow particles in ~50 inch2 or ~324 cm2 area = <20
A grade quartz: Quartz lumps with clean white / translucent sides and negligible physical impurities, with a silica percentage of around 98% or higher.
1. Oversize (% by weight) using NABL calibrated test sieves of Jayant Scientific = <10%
2. Undersize (% by weight) using NABL calibrated test sieves of Jayant Scientific = <10%
3. Contamination (number) which is visually counted in terms of black and red-yellow particles in ~50 inch2 or ~324 cm2 area = <20
A grade quartz: Quartz lumps with clean white / translucent sides and negligible physical impurities, with a silica percentage of around 98% or higher.
1. Oversize (% by weight) using NABL calibrated test sieves of Jayant Scientific = <10%
2. Undersize (% by weight) using NABL calibrated test sieves of Jayant Scientific = <10%
3. Contamination (number) which is visually counted in terms of black and red-yellow particles in ~50 inch2 or ~324 cm2 area = <20
