Vitreous Silica is the generic term used to describe all types of silica glass, and manufacturers refer to the material as either Fused Quartz or Fused Silica. View the typical physical properties of fused quartz Typical properties are average data and should not be used as or to develop product specifications. However, measuring specific gravity is difficult and time consuming. Some, such as diamond, are very hard; others, such as naphthalene (moth balls) or ice, are soft, by comparison, and are easily crushed. Physical properties: Electrical resistivity of geologic materials : Introduction . It has electrical properties and heat resistance that make it valuable in electronic products. Its usefulness can be linked to its physical and chemical properties. A simple circuit can be constructed to test this. The latter is not the same as normal quartz (or α-quartz), low quartz or just quartz. Natural blue diamonds conduct electricity while the irradiated blue ones do not. Silica is found almost everywhere in nature, and represents almost 1/3 the mass of the earth’s crust. This makes SG one of the most useful gemstone physical properties you can have for identification. The conversion, from one solid substance to another solid substance, of quartz to β-quartz is quick, reversible and accompanied with a slight energy absorption. Performance SP-200 series Density 2.2 x 103kg/m3 Tensile strength 4.7 x 107Pa(n/m2) Compressive strength >1.1 x 109Pa Coefficient of thermal expansion (20 oC -300 oC) 5.5 x 10-7 cm/cm oC Thermal conductivity (20 oC) 1.4w/m oC Specific heat (20 oC) 660J/kg oC Softening Point 1683 oC Annealing point 1215 oC Remark： Thermal stability- The transparent quartz tube was heated to about 1100 oC … β-quartz has higher symmetry, is less dense and has a slightly lower specific gravity. Quartz watches use these properties. Quartz is one of the most useful natural materials. Thus, you normally only conduct this test when necessary. Understanding how electrical resistivity (or conductivity) relates to the actual geologic properties of the earth is important. It has a hardness of seven on the Mohs Scale which makes it very durable. Its It is chemically inert in contact with most substances. Fused quartz is a solid material at room temperature, but at high temperatures, it behaves like all glasses. Physical Properties and Crystal Types: From personal experience you known that solids exhibit a wide range of physical properties. Approximate weight per square foot (3 cm) 15 lbs. Electrical current is conducted better in some gemstones than others. Properties of Fused Quartz. Silicon chips depend upon the directional crystal properties to function. Quartz: 2.63-2.68: Opal: 1.99-2.25: Amber : 1.05-1.096: As you can see from the chart, few gems share the same SG range. CORIAN®QUARTZ PERFORMANCE PROPERTIES PHYSICAL PROPERTIES Property Test Typical Result Density ASTM D792 2.4 g/cm3 Nominal Thickness 2 cm and 3 cm Approximate weight per square foot (2 cm) 10 lbs. Thermal Expansion ASTM D696 1.45 x 10-5m/m°C (8.06 x 10-6 in./in.°F) Hardness Mohs Hardness Scale 7 MECHANICAL PROPERTIES Property … Effects of Temperature.